Organic Chemistry - Christoffers

Publications

163

Saustin Dongmo, Gunther Wittstock, Jens Christoffers, Izabella Brand,

In situ determination of potential-driven structural changes in a redox-active plumbagin polymer film on a glassy carbon electrode using PM IRRAS under electrochemical control

Electrochim. Acta 2017, 255, 298-308.

 

162  

Irina Geibel, Marc Schmidtmann, Jens Christoffers,   

Cerium-Catalyzed, Oxidative Synthesis of Annulated, Tetrasubstituted Dihydrofuran-Derivatives,

Org. Biomol. Chem. 2017, 15, 7824-7829.

161 

Torben Alpers, Marc Schmidtmann, Thomas W. T. Muesmann, Oliver Temme, Jens Christoffers,

Perfluorinated Pyridinium and Imidazolium Ionic Liquids,

Eur. J. Org. Chem. 2017, 4283-4290.

160

Irina Geibel, Christoph Kahrs, Jens Christoffers,

Formation of Bicyclic Cyclopentenone Derivatives by Robinson-Type Annulation of Cyclic β-Oxoesters with 1,4-Diketone Moiety,

Synthesis 2017, 49, 3874–3884.

159

Melanie Wallisch, Stefan Sulmann, Karl-Wilhelm Koch, Jens Christoffers,

Bifunctional Diaminoterephthalate Fluorescent Dye as Probe for Cross-Linking Proteins,

Chem. Eur. J. 2017, 23, 6535-6543.

158  

Irina Geibel, Anna Dierks, Thomas Müller, Jens Christoffers,

Formation of δ-Lactones with anti-Baeyer-Villiger Regiochemistry – Investigations into the Mechanism of the Cerium-Catalyzed Aerobic Coupling of β-Oxoesters with Enol Acetates,

Chem. Eur. J. 2017, 23, 7245-7254.

157
Maren Zark, Jens Christoffers, Thorsten Dittmar,

Molecular properties of deep-sea dissolved organic matter are predictable by the central limit theorem: evidence from tandem FT-ICR-MS,

Mar. Chem. 2017, 191, 9-15.

156

Elisabeth Jaskulska, Gunther Wittstock, and Jens Christoffers,

Improved Synthesis of Pinacol Dimethylether – a Superior Solvent for Lithium Oxygen Batteries,

Synlett 2017, 28, 705-706.

155

Torben Alpers, Thomas W. T. Muesmann, Oliver Temme, Jens Christoffers,

Aromatic Esters, Carbinols and Derivatives Thereof with Perfluorohexyl Residues as Alternatives to Perfluoroalkyl Carboxylic and Sulfonic Acids,

Eur. J. Org. Chem. 2017, 609–617.

154

Irina Geibel, Anna Dierks, Marc Schmidtmann, Jens Christoffers,

Formation of δ-Lactones by Cerium-Catalyzed, Baeyer-Villiger-Type Coupling of β-Oxo­esters, Enol Acetates and Dioxygen,

J. Org. Chem. 2016, 81, 7790-7798.

153

Matthias Bender, Henrik Mouritsen, Jens Christoffers,

A robust synthesis of 7,8-didemethyl-8-hydroxy-5-deazariboflavin, 

Beilstein J. Org. Chem. 2016, 12, 912-917.

152

Stefan Sulmann, Melanie Wallisch, Alexander Scholten, Jens Christoffers, Karl-Wilhelm Koch,

Mapping Calcium-sensitive Regions in the Neuronal Calcium Sensor GCAP2 by Site Specific Fluorescence Labeling,

Biochemistry 2016, 55, 2567–2577.

151

Irina Geibel, Jens Christoffers,

Synthesis of 1,4-Diketones from β-Oxoesters and Enol Acetates by Cerium Catalyzed Oxidative Umpolung Reaction, 

Eur. J. Org. Chem. 2016, 918-920.

150

Matthias Bender, Marc Schmidtmann, Roger E. Summons, Jürgen Rullkötter, Jens Christoffers,

A Geomimetic Approach to the Formation and Identification of Fossil Sterane Biomarkers in Crude Oil: 18-nor-D-homo-Androstane and 5α,14β-Androstane,

Chem. Eur. J. 2015, 21, 12501-12508.

149

Benoît Rogez, Rebecca Horeis, Eric Le Moal, Jens Christoffers, Katharina Al-Shamery, Gérald Dujardin, Elizabeth Boer-Duchemin,

Optical and Electrical Excitation of Hybrid Guided Modes in an Organic Nanofiber-Gold Film System,

J. Phys. Chem. C 2015, 119, 22217–22224.

148  

Christina Zitzer, Thomas W. T. Muesmann, Jens Christoffers, Mathias S. Wickleder,

1,4-Benzenedisulfonic acid (H2BDS) as terephthalic acid analogue for the preparation of coordination polymers: The examples of M(BDS)(NMP)3 (M = Mn, Fe, Co; NMP = N-methylpyrrolidone), 

New J. Chem. 2015, 39, 6117-6124.

147  

Christina Zitzer, Thomas W. T. Muesmann, Karina Hunfeld, Jens Christoffers, Mathias S. Wickleder,

Molecular Rectangles with Rod-Shaped Disulfonic Acids,

Eur. J. Inorg. Chem. 2015, 2159-2163.

146  

Lena Freimuth, Jens Christoffers,

Bifunctional Diaminoterephthalate Scaffolds as Fluorescence Turn-on Probes for Thiols,

Chem. Eur. J. 2015, 21, 8214-8221.

145  

Barhiem Schickmous, Thorsten Klüner, Jens Christoffers,

Synthesis of Annulated and Spirocyclic Butenolide Derivatives by Condensation of Malonates with Cyclic α-Hydroxy β-Dicarbonyl Compounds,

Synlett 2015, 26, 1357-1360.

144

Christina Zitzer, Thomas W. T. Muesmann, Jens Christoffers, Mathias S. Wickleder,

Crystal engineering with tolanedisulfonic acid (H2TDS): Helical chains in Zn(TDS)(DMA)3, linear chains in Zn(TDS)(NMP)3, and complex anions in [HDMA]2[Zn(TDS)2(DMA)3](DMA)2,

Chem. Asian J. 2015, 10, 1354-1362.

143

Miriam Penning, Enno Aeissen, Jens Christoffers,

Preparation of Tetrahydrothienoazocinone Derivatives,

Synthesis 2015, 47, 1007-1015.

142

Lena Freimuth, Carlo Andrea Rozzi, Christoph Lienau, Jens Christoffers,

A Diaminoterephthalate C60 Dyad – a New Material for Opto-Electronic Applications,

Synthesis 2015, 47, 1325-1328.

141

Stefano Pittalis, Alain Delgado, Jörg Robin, Lena Freimuth, Jens Christoffers, Christoph Lienau, Carlo Andrea Rozzi,

Charge separation dynamics and opto-electronic properties of a diaminoterephthalate-C60 dyad,

Adv. Funct. Mater. 2015, 25, 2047-2053.

140

Christina Zitzer, Thomas W. T. Muesmann, Jens Christoffers, Christian Schwickert, Rainer Pöttgen, Mathias S. Wickleder,

1,2,4,5-Benzenetetrasulfonic acid and 1,4-benzenedisulfonic acid as sulfo analogues of pyromellitic and terephthalic acid for building coordination polymers of manganese,

CrystEngComm 2014, 16, 11064–11077.

139

Florian Behler, Christina Zitzer, Mathias S. Wickleder, Jens Christoffers,

trans-1,2-Cyclohexanedisulfonic Acid – An Optically Active Linker for Coordination Polymers,

Eur. J. Inorg. Chem. 2014, 6225-6231.

138

Florian Behler, Mathias S. Wickleder, Jens Christoffers,

Biphenyl and bimesityl tetrasulfonic acid – new linker molecules for coordination polymers, 

ARKIVOC 2015, (ii), 64–75.

137

Paul Penner, Xianghui Zhang, Emanuel Marschewski, Florian Behler, Polina Angelova, André Beyer, Jens Christoffers, Armin Gölzhäuser,

Charge Transport through Carbon Nanomembranes,

J. Phys. Chem. C 2014, 118, 21687-21694.

136

Martina Würdemann, Jens Christoffers

Investigations on intramolecular 1,3-dipolar cycloadditions for the synthesis of isoxazolo-annulated pyrrolidines, piperidines and azepanes,

Tetrahedron 2014, 70, 4640-4644.

135

Barhiem Schickmous, Jens Christoffers,

Synthesis of Tetrasubstituted Furan Derivatives by Condensation of 1,3-Diketones with Cyclic α-Hydroxy-β-oxo Esters,

Eur. J. Org. Chem. 2014, 4410-4416. 

134

Christina Zitzer, Thomas W. T. Muesmann, Jens Christoffers, Mathias S. Wickleder,

Crystal structure of iron(II)-benzenedisulfonate-triaqua-bis(N-methylpyrrolidone), Fe(BDS)(H2O)3(NMP)2, C16H28FeN2O11S2, 

Z. Kristallogr. NCS 2014, 229, 103-106. 

133

Frank Meiners, Jan Henning Ross, Izabella Brand, Anna Buling, Manfred Neumann, Philipp Julian
Köster, Jens Christoffers, Gunther Wittstock,

Modification of Silicon Oxide Surfaces by Monolayers of an Oligoethylene Glycol-Terminated Perfluoroalkyl Silane.

Colloids Surf. A: Physicochem. Eng. Aspects 2014, 449, 31-41.

132

Miriam Penning, Jens Christoffers,

Synthesis of Regioisomeric Pyrido[c]azocanones from Azaindanone Derivatives,

Eur. J. Org. Chem. 2014, 2140-2149.

131

Marvin Schulz, Jens Christoffers,

An Unprecedented Ring Transformation of a 4-(Amino­methyl)­oxazoline Derivative to a 4-(Hydroxymethyl)imidazoline,

Synthesis 2014, 46, 81-86.

130

Marvin Schulz, Jens Christoffers,

Synthesis of Functionalized Pyridine-2,6-bis(imidazolines) by Ring Transformation of 4-(Aminomethyl)oxazoline Derivatives,

Eur. J. Org. Chem. 2013, 7624-7630.

129

Martina Würdemann, Jens Christoffers,

Nitriloxide versus Nitrone - Switching Regioselectivity of Intramolecular 1,3-Di­polar Cycloadditions Towards the Preparation of Aminopiperidinecarboxylates,

Eur. J. Org. Chem. 2013, 7421-7431.

128

Matthias Bender, Marc Schmidtmann, Jürgen Rullkötter, Roger E. Summons, Jens Christoffers,

Identification of a Fossil Sterane Biomarker in Crude Oil - an Androstane with Modified Carbon Skeleton,

Eur. J. Org. Chem. 2013, 5934-5945.

127

Thomas W. T. Muesmann, Mathias S. Wickleder, Christina Zitzer, Jens Christoffers,

Octahydropentalene 2,5-Disulfonic Acid - A New Linker Molecule for Coordination Polymers,

Synlett 2013, 24, 959-962.

126

Carlo Andrea Rozzi, Sarah Maria Falke, Nicola Spallanzani, Angel Rubio, Elisa Molinari, Daniele Brida, Margherita Maiuri, Giulio Cerullo, Heiko Schramm, Jens Christoffers, Christoph Lienau

Quantum coherence controls the charge separation in a prototypical artifical light harvesting system,
 
Nature Commun. 2013, 4, 1602.

125

Miriam Penning, Jens Christoffers,

Dihydropyridazine Derivatives with Cyclopenta-, Benzo-, Furo-, Thiopyrano- and Pyrido-Annulation,

Eur. J. Org. Chem. 2013, 389-400.

124

Marvin Schulz, Jens Christoffers,

New macrocyclic bistriazolophanes with thioindigo chromophore,

Tetrahedron 2013, 69, 802-809.

123

Nina Wache, Alexander Scholten, Thorsten Klüner, Karl-Wilhelm Koch, Jens Christoffers

Turning-On Fluorescence by Thiols - Synthetic and Computational Studies on Diaminoterephthalates and Monitoring the Switch of the Ca2+-Sensor Recoverin,

Eur. J. Org. Chem. 2012, 5712-5722.

122

Nina Wache, Claudia Schröder, Karl-Wilhelm Koch, Jens Christoffers,

Diaminoterephthalate Turn-On Fluorescence Probes for Thiols - Tagging of Recoverin and Tracking of its Conformational Change,

ChemBioChem 2012, 13, 993-998.

121

Miriam Penning, Jens Christoffers

Preparation of New 1,4-Diazocanes as Scaffolds for Combinatorial Chemistry,

Eur. J. Org. Chem. 2012, 1809-1818.

120

Matthias Bender, Jens Christoffers

Investigations into the Regioselectivity of Fischer Indole and Friedländer Quinoline Syntheses with an Octahydroisobenzofuran and Octahydroisoindole Derivate,

Z. Naturforsch. B 2011, 66b, 1209-1218.

119

Martina Würdemann, Jens Christoffers

A Short Synthesis of a Trifold Orthogonally Protected, Novel Aminoazepanol Building Block,

Synlett 2011, 2841-2843.

118

Jens Christoffers, Mathias Wickleder, Thomas Muesmann, Christina Zitzer, Andrea Mietrach

Verfahren zur Herstellung von Polysulfonsäuren und Verwendung derselben,

DE 10 2010 024272 A1 2011.03.30.

117

Thomas W. T. Muesmann, Mathias S. Wickleder, Jens Christoffers

Preparation of Linear Aromatic Disulfonic Acids - New Linker Molecules for Metal Organic Frameworks,

Synthesis 2011, 2775-2780.

116

Sascha Norden, Matthias Bender, Jürgen Rullkötter, Jens Christoffers

Androstanes with Modified Carbon Skeletons,

Eur. J. Org. Chem. 2011, 4543-4550.

115

Florian Behler, Florian Habecker, Wolfgang Saak, Thorsten Klüner, Jens Christoffers

Synthesis of Benzo[c]azocanones and Indeno[1,2-b]pyrroles from Indanonecarboxylates,

Eur. J. Org. Chem. 2011, 4231-4240.

114

Jens Christoffers, Jonas Sluiter, Jan Schmidt

Enantioselective Synthesis of Hexahydroisobenzofuran and Hexahydroisoindole Derivatives with Quaternary Stereocenters,

Synthesis 2011, 895-900.

113

Thomas W. T. Muesmann, Christina Zitzer, Mathias S. Wickleder, Jens Christoffers,

Synthesis of trans-1,4-Cyclohexanedisulfonic Acid and its Zinc Salt - a Belt-Like Metal-Organic Coordination Polymer with Tetrahedrally and Octahedrally Zinc Ions,

Inorg. Chim. Acta 2011, 369, 45-48.

112

Thomas W. T. Muesmann, Jan Ohlert, Mathias S. Wickleder, Jens Christoffers,

Synthesis and Reactions of 2,5-Disulfobenzene-1-diazonium Salts: Towards Functionalized Sulfonate Metal Organic Frameworks,

Eur. J. Org. Chem. 2011, 1695-1701.

111

Thomas W. T. Muesmann, Christina Zitzer, Andrea Mietrach, Thorsten Klüner, Jens Christoffers, Mathias S. Wickleder,

para-Benzene Disulfonic Acid and its Tetrachloro and Tetrafluoro Derivates - Studies Towards Polyhalogenated Metal-Organic-Frameworks with Sulfo Analogues of Terephthalic Acid,

Dalton Trans. 2011, 40, 3128-3141.

110

Robert von Rönn, Jens Christoffers,

Acetyl-BINOL as Mimic for Chiral β-Diketonates: A Building Block for New Modular Ligands,

Tetrahedron 2011, 67, 334-338.

109

Andrea Mietrach, Thomas W. T. Muesmann, Christian Zilinski, Jens Christoffers, Mathias S. Wickleder,

Benzene Trisulfonic Acid (H3BTS) as Analogue of Trimesic Acid for Building Open Frameworks:
The First Rare Earth Examples [La(H2O)5(BTS)] and [RE(H2O)4(BTS)] (RE = Nd, Sm, Eu),

Z. Anorg. Allg. Chem. 2011, 637, 195-200.

108

Jens Christoffers,

Cerium and Bismuth Catalysis Hand in Hand - Synthesis of a Eight-Membered Ring Lactam Library,

Catal. Today 2011, 159, 96-99.

107

Thomas W. T. Muesmann, Andrea Mietrach, Jens Christoffers, Mathias S. Wickleder,

Synthesis of 1,2,4,5-Benzenetetrasulfonic Acid (H4B4S) and its Implementation as a Linker for Building Metal-Organic Frameworks on the Example of [Cu2(B4S)(H2O)8] · 0.5 H2O,

Z. Anorg. Allg. Chem. 2010, 636, 1307-1312.

106

Martina Würdemann, Jens Christoffers,

Synthesis of Spirocyclic Carbazole- and Acridine-Lactams,

Org. Biomol. Chem. 2010, 8, 1894-1898.

105

Heiko Schramm, Wolfgang Saak, Christoph Hoenke, Jens Christoffers,

Synthesis of Triazolyl-Substituted 3-Aminopiperidines by Huisgen-1,3-Dipolar Cycloaddition - New Scaffolds for Combinatorial Chemistry,

Eur. J. Org. Chem. 2010, 1745-1753.

104

Heiko Schramm, Jens Christoffers,

Synthesis, resolution and absolute configuration of 4-amino-3-phenyl­piperidine,

Tetrahedron: Asymmetry 2009, 20, 2724-2727.

103

Andrea Mietrach, Thomas W. T. Muesmann, Jens Christoffers, Mathias S. Wickleder,

Sulfonic Acid Analogs of Terephthalic and Trimesic Acid as Linkers in Metal Organic Frameworks - Synthesis of Thermally Robust MOFs,

Eur. J. Inorg. Chem. 2009, 5328-5334.

102

Nina Wache, Jens Christoffers,

Synthesis of Some New Optically Active Octahydro-6H-pyrido[4,3-b]carbazole-Derivatives

Synlett 2009, 3016-3018.

101

Izabella Brand, Martina Nullmeier, Thorsten Klüner, Rajamalleswaramma Jogireddy, Jens Christoffers, Gunther Wittstock,

Structural analysis of the HS(CD2)12(O-CH2 -CH2) 6OCH3 monolayers on gold by means of polarization modulation infrared reflection absorption spectroscopy. Progress of the reaction with bromine,

Langmuir 2010, 26, 362-370.

100

Rebekka Pflantz, Jonas Sluiter, Mario Krička, Wolfgang Saak, Christoph Hoenke, Jens Christoffers,

A New Synthesis of Sulfur, Nitrogen and Oxygen Containing Eight-Membered Ring Lactams,

Eur. J. Org. Chem. 2009, 5431-5436.

99

Michael Rössle, Jens Christoffers,

The source of oxygen in cerium-catalyzed α-hydroxylation of β-dicarbonyl compounds,

Tetrahedron 2009, 65, 10941-10944.

98

Heiko Schramm, Maria Pavlova, Christoph Hoenke, Jens Christoffers

Straightforward and Scalable Synthesis of Orthogonally Protected 3,7-Diazabicyclo[4.1.0]heptane,

Synthesis 2009, 1659-1662.

97

Rebekka Pflantz, Jens Christoffers

Di­ami­no­tere­phtha­lates - New Scaffolds for Combinatorial Chemistry,

Chem. Eur. J. 2009, 15, 2200-2209.

96

Tanja Asthalter, Rajagopalan Subramanian, Thomas Kauf, Volker Rabe, Jens Christoffers

Monitoring Reaction Intermediates in the FeCl3-Catalyzed Michael Reaction by Nuclear Inelastic Scattering,

J. Phys. Chem. A 2008, 112, 11514-11518.

95

Jonas Sluiter, Jens Christoffers

Synthesis of 1-Methylbenzimidazoles from Carbonitriles,

Synlett 2009, 63-66.

94

Jens Christoffers, Herbert Frey

Iron-Catalyzed Michael Reactions - From Experiment to Theory and Back,

Chimica Oggi/Chem. Today Suppl. 2008, 26, 26-28.

93

Claas Lüder Diedrich, Detlev Haase, Jens Christoffers

New Octahydropyrido[3,4-b]acridine Scaffolds for Combinatorial Chemistry,

Synthesis 2008, 2199-2210.

92

Jens Christoffers, Przemysław Starynowicz

A europium(II) complex with bis-pyridino-18-crown-6,

Polyhedron 2008, 27, 2688-2692.

91

Yawei Zhang, Przemysław Starynowicz, Jens Christoffers

Fluorescent Bis(oligophenylylamino)terephthalates,


Eur. J. Org. Chem. 2008, 3488-3495.

90

Rajamalleswaramma Jogireddy, Izabella Zawisza, Gunther Wittstock, Jens Christoffers

Short Synthesis of a Specifically Perdeuterated Hexaethylene Glycol-Terminated Alkanethiol,

Synlett 2008, 1219-1221.

89

Claas Lüder Diedrich, Detlev Haase, Wolfgang Saak, Jens Christoffers

Regioselectivity of Friedländer Quinoline Syntheses,

Eur. J. Org. Chem. 2008, 1811-1816.

88

Rajamalleswaramma Jogireddy, Jürgen Rullkötter, Jens Christoffers

Straightforward Introduction of Side Chains on the Estrane Skeleton - Convenient Synthesis of a 19-Norcholestane,

Synlett 2007, 2847-2850.

87

Jens Christoffers, Herbert Frey, Anna Rosiak

Addition and Conjugate Addition Reactions to Carbonyl Compounds,

in Iron Catalysis in Organic Chemistry. Reactions and Applications (Hrsg. B. Plietker), Wiley-VCH, Weinheim, 2008, 225-251.

86

Girish Koripelly, Wolfgang Saak, Jens Christoffers

First Synthesis of Optically Active (+)-Canangone, its 6-Epimer and Determination of Absolute Configuration,

Eur. J. Org. Chem. 2007, 5840-5846.

85

Yawei Zhang, Jens Christoffers

Synthesis of s-Indacene Derivatives by Double Robinson-Type Cyclopentene Annulation,

Synthesis 2007, 3061-3067.

84

Claas Lüder Diedrich, Wolfgang Frey, Jens Christoffers

Linear Versus Angular Fischer Indole Annulation - Relative Configuration Determines Regioselectivity,

Eur. J. Org. Chem. 2007, 4731-4737.

83

Anna Rosiak, Christoph Hoenke, Jens Christoffers

Synthesis of 3-Phenyl-4-piperidones from Acetophenone by Shapiro and aza-Michael Reaction and their further Derivatization,

Eur. J. Org. Chem. 2007, 4376-4382.

82

Rebekka Pflantz, Patrick Tielmann, Michael Rössle, Christoph Hoenke, Jens Christoffers

Eight-Membered Ring Lactams - New Scaffolds for Combinatorial Chemistry Prepared by Ring-Expansion of 1,4-Dike­to­nes with Primary Amines,

Eur. J. Org. Chem. 2007, 3227-3238.

81

Jens Christoffers, Girish Koripelly, Anna Rosiak, Michael Rössle

Recent Advances in Metal-Catalyzed Asymmetric Conjugate Additions,

Synthesis 2007, 1279-1300.

80

Anna Rosiak, Ralf M. Müller, Jens Christoffers

Synthesis of 2,3-Dihydrothiopyran-4-ones from 3-Oxo-1-pentene-4-ynes,

Monatsh. Chem. 2007, 138, 13-26.

79

Anna Rosiak, Wolfgang Frey, Jens Christoffers

Synthesis of Tetrahydropyran-4-ones and Thiopyran-4-ones from Donor-Sub­stituted α‑Bro­mo­styrene Derivatives,

Eur. J. Org. Chem. 2006, 4044-4054.

78

Jens Christoffers, Thomas Werner, Michael Rössle

Cerium-catalyzed oxidative C-C bond forming reactions,

Catal. Today 2007, 121, 22-26.

77

Anna Rosiak, Jens Christoffers

Synthesis of unsymmetrically 2,6-disubstituted 2,3-dihydrothiopyran-4-ones,

Tetrahedron Lett. 2006, 47, 5095-5097.

76

Anna Rosiak, Jens Christoffers

Synthesis of 3-Aryl-Substituted Tetrahydropyran-4-ones and Tetrahydrothiopyran-4-ones,

Synlett 2006, 1434-1436.

75

Jens Christoffers, Thomas Kauf, Thomas Werner, Michael Rössle

Cerium-Catalyzed α-Hydroxylation Reactions of α-Cyclopropyl β-Dicarbonyl Compounds with Molecular Oxygen,

Eur. J. Org. Chem. 2006, 2601-2608.

74

Jens Christoffers, Yawei Zhang, Wolfgang Frey, Peter Fischer

Synthesis of s-Indacene Derivatives by Robinson-Type Cyclopentene Annulation,

Synlett 2006, 624-626.

73

Jens Christoffers

An Example of Regioselective Fischer Indole Annulation,

Synlett 2006, 318-320.

72

Michael Rössle, Jens Christoffers

Access to Eight-Membered Ring Lactams from Five-Membered Ring 1,4-Diketones and Primary Amines,

Synlett 2006, 106-108.

71

Dieter Flockerzi, Ulrich Kautz, Armin Hatzelmann, Christof Zitt, Andrea Wohlsen, Degenhard Marx, Hans-Peter Kley, Jens Christoffers, Anna Rosiak

Novel 3-Thia-10-azaphenanthrene Derivatives,

WO 2006/027345 A2.

70

Dieter Flockerzi, Ulrich Kautz, Armin Hatzelmann, Christof Zitt, Andrea Wohlsen, Degenhard Marx, Hans-Peter Kley, Jens Christoffers, Anna Rosiak

Novel 3-Oxa-10-azaphenanthrene Derivatives,

WO 2006/027344 A2.

69

Burkard Kreidler, Angelika Baro, Jens Christoffers

Asymmetric Michael Reactions on Polymeric Support: Auxiliary Immobilization and Stereo­selective Construction of Quaternary Stereocenters,

Eur. J. Org. Chem. 2005, 5339-5348.

68

Michael Rössle, Thomas Werner, Wolfgang Frey, Jens Christoffers

Cerium-Catalyzed, Aerobic Oxidative Synthesis of 1,2-Dioxane Derivatives from Styrene and Their Fragmentation into 1,4-Dicarbonyl Compounds,

Eur. J. Org. Chem. 2005, 5031-5038.

67

Jens Christoffers, Angelika Baro

Stereoselective Construction of Quaternary Stereocenters,

Adv. Synth. Catal. 2005, 347, 1473-1482.

66

Mark Niemeyer, Jens Christoffers, Michael Rössle

An optically active heteroleptic cerium camphorate: [bis(trimethylsilyl)amido-κN]­bis[(+)-(1R,4R)-3-(trifluoro­acetyl)camphorato-κ2O,O'](1,3,5-trimethyl-1,3,5-triaza­cyclo­hexane-κ3N,N',N'')­cerium(III),

Acta Cryst. E 2005, E61, m1207-m1209.

65

Matthias Bauer, Thomas Kauf, Jens Christoffers, Helmut Bertagnolli

Investigations into the metal species of the homogeneous iron(III) catalyzed Michael addition reactions,

Phys. Chem. Chem. Phys. 2005, 7, 2664-2670.

64

Burkard Kreidler, Angelika Baro, Wolfgang Frey, Jens Christoffers

Generation of Quaternary Stereocenters by Asymmetric Michael Reactions: Enamine Regiochemistry as Configuration Switch,

Chem. Eur. J. 2005, 11, 2660-2667.

63

Burkard Kreidler, Angelika Baro, Jens Christoffers

A Poly(ethylene glycol) Supported Chiral Auxiliary for Asymmetric Michael Reactions,

Synlett 2005, 465-468.

62

Angelika Baro, Jens Christoffers

Michael Reactions and Conjugate Additions,

in Quaternary Stereocenters: Challenges and Solutions for Organic Synthesis (Hrsg. J. Christoffers, A. Baro), Wiley-VCH, Weinheim 2005, 83-115.

61

Michael Rössle, Thomas Werner, Angelika Baro, Wolfgang Frey, Jens Christoffers

Synthese von 1,4-Diketonen durch aerobe oxidative C-C-Kupplung von Styrol mit 1,3‑Dicarbonylverbindungen,

Angew. Chem. 2004, 116, 6709-6711;

Formation of 1,4-Diketones by Aerobic Oxidative C-C Coupling of Styrene with 1,3‑Di­car­ bonyl Compounds,

Angew. Chem. Int. Ed. 2004, 43, 6547-6549.

60

Jens Christoffers, Thomas Werner, Angelika Baro, Peter Fischer

Synthesis of a tin-functionalized cyclopentadiene derivative,

J. Organomet. Chem. 2004, 689, 3550-3555.

59

Jens Christoffers, Heiko Scharl, Wolfgang Frey, Angelika Baro

Synthesis of an Optically Active Decahydro-6-isoquinolone Scaffold with Quaternary Stereocenter,

Eur. J. Org. Chem. 2004, 2701-2706.

58

Jens Christoffers, Heiko Scharl, Wolfgang Frey, Angelika Baro

Transformation of an Optically Active Decahydro-6-isoquinolone Scaffold: Perfect Felkin-Anh Diastereoselectivity,

Org. Lett. 2004, 6, 1171-1173.

57

Jens Christoffers, Wolfgang Frey, Heiko Scharl, Angelika Baro

Absolute Konfiguration von (+)-1,2,3,4,6,7,8,8a-Octahydro-6-isochinolon-8a-carbon­säure­methylester und die Stereochemie einer Kupfer-katalysierten asymmetrischen Michael Reaktion,

Z. Naturforsch. B 2004, 59b, 375-379.

56

Jens Christoffers, Angelika Baro, Thomas Werner

α-Hydroxylation of β-Dicarbonyl Compounds,

Adv. Synth. Catal. 2004, 346, 143-151.

55

Jens Christoffers, Thomas Werner, Wolfgang Frey, Angelika Baro

Straightforward Synthesis of (R)-(-)-Kjellmanianone,

Chem. Eur. J. 2004, 10, 1042-1045.

54

Jens Christoffers, Thomas Werner, Wolfgang Frey, Angelika Baro

Cerium-Catalyzed Reaction of β-Dicarbonyl Compounds with Styrene and Atmospheric Oxygen,

Eur. J. Org. Chem. 2003, 4879-4886.

53

Jens Christoffers, Katja Schuster

A Novel L-Neopentylglycine Derivative as Auxiliary for Copper-Catalyzed Asymmetric Michael Reactions,

Chirality 2003, 15, 777-782.

52

Jens Christoffers

Formation of Quaternary Stereocenters by Copper-Catalyzed Michael Reactions with L‑Valine Amides as Auxiliaries,

Chem. Eur. J. 2003, 9, 4862-4867.

51

Silke Pelzer, Thomas Kauf, Christoph van Wüllen, Jens Christoffers

Catalysis of the Michael reaction by iron(III): calculations, mechanistic insights and experimental consequences,

J. Organomet. Chem. 2003, 684, 308-314.

50

Jens Christoffers, Burkard Kreidler, Sven Unger, Wolfgang Frey

Regioselective Enamine Formation from Oxonia-Boranuida-Betaines and Their Appli­ca­tion in Asymmetric Michael Reactions,

Eur. J. Org. Chem. 2003, 2845-2853.

49

Jens Christoffers, Heiko Oertling, Wolfgang Frey

Regioselective Spiroannulations of α-Acetyl Lactones,

Eur. J. Org. Chem. 2003, 1665-1671.

48

Jens Christoffers, Burkard Kreidler, Heiko Oertling, Sven Unger, Wolfgang Frey

Regioselective Formation of endo- and exo-Cyclic Enamines: Both Enantiomeric Products Accessible by the Same Chiral Auxiliary,

Synlett 2003, 493-496.

47

Jens Christoffers, Angelika Baro

Aufbau quartärer Stereozentren: neue Möglichkeiten durch enantioselektive Michael-Reaktion,

Angew. Chem. 2003, 115, 1726-1728;

Construction of Quaternary Stereocenters: New Perspectives through Enantioselective Michael Reactions,

Angew. Chem. Int. Ed. 2003, 42, 1688-1690.

46

Jens Christoffers, Heiko Oertling, Peter Fischer, Wolfgang Frey

Studies on the α-acetylation of δ-valerolactone and ε-caprolactone,

Tetrahedron 2003, 59, 3769-3778.

45

Jens Christoffers, Thomas Werner, Sven Unger, Wolfgang Frey

Preparation of Acyloins by Cerium-Catalyzed, Direct Hydroxyla­tion of β-Dicarbonyl Com­pounds with Molecular Oxygen,

Eur. J. Org. Chem. 2003, 425-431.

44

Jens Christoffers, Heiko Oertling, Peter Fischer, Wolfgang Frey

Synthesis of α-Acetyl Lactones; Access to 14-Membered Bislactones by Attempts at Direct Ring Closure,

Synlett 2002, 957-961.

43

Jens Christoffers, Heiko Scharl

Copper-Catalyzed Asymmetric Michael Reactions with α-Amino Acid Amides: Synthe­sis of an Optically Active Piperidine Derivative,

Eur. J. Org. Chem. 2002, 1505-1508.

42

Jens Christoffers

Michael Addition,

in Encyclopedia of Catalysis (Hrsg. I. Horvath), Wiley, New York, 2003, 5, 99-118.

41

Jens Christoffers, Thomas Werner

Cerium-catalyzed α-Oxidation of β-Dicarbonyl Compounds with Molecular Oxygen,

Synlett 2002, 119-121.

40

Jens Christoffers, Alexander Mann

Enantioselektiver Aufbau quartärer Stereozentren,

Angew. Chem. 2001, 113, 4725-4732;

Enantioselective Construction of Quaternary Stereocenters,

Angew. Chem. Int. Ed. 2001, 40, 4591-4597.

39

Jens Christoffers

Catalysis of the Michael Reaction and the Vinylogous Michael Reaction by Ferric Chloride Hexahydrate,

Synlett 2001, 723-732.

38

Jens Christoffers, Ulrich Rößler

Synthesis of C2-symmetric tris-thioethers via optically active mustards,

Tetrahedron 2001, 57, 1779-1783.

37

Jens Christoffers, Yvonne Schulze, Joachim Pickardt

Synthesis, resolution, and absolute configuration of trans-1-amino-2-dimethylamino­cyclo­hexane,

Tetrahedron 2001, 57, 1765-1769.

36

Jens Christoffers, Alexander Mann

New Auxiliaries for Copper-Catalyzed Asymmetric Michael Reactions: Generation of Quaternary Stereocenters at Room Temperature,

Chem. Eur. J. 2001, 7, 1014-1027.

35

Jens Christoffers, Ulrich Rößler

One-Pot Generation and Conversion of Trichloroacet­imi­dates for the Racemization-Free Allylation and Benzylation of α- Hydroxyesters and the Enantiopure Synthesis of a Chiral Diglycole,

J. Prakt. Chem. 2000, 342, 654-658.

34

Jens Christoffers, Heiko Oertling, Neclâ Önal

Some Iron(III) Catalyzed Michael Reactions of Chiral Donors, bis-Donors, and a bis-Acceptor,

J. Prakt. Chem. 2000, 342, 546-553.

33

Jens Christoffers, Alexander Mann

Neue chirale Auxiliare für den Aufbau quartärer Stereozentren durch kupferkatalysierte Michael-Reaktionen,

Angew. Chem. 2000, 112, 2871-2874;

New Chiral Auxiliaries for the Construction of Quaternary Stereocenters by Copper-Catalyzed Michael Reactions,

Angew. Chem. Int. Ed. 2000, 39, 2752-2754.

32

Jens Christoffers, Neclâ Önal

Azeotropic Transesterification of β-Keto Esters,

Eur. J. Org. Chem. 2000, 1633-1635.

31

Jens Christoffers, Alexander Mann

Synthesis of Biaryl Compounds by Vinylogous Michael Reactions,

Eur. J. Org. Chem. 2000, 1977-1982.

30

Jens Christoffers, Heiko Oertling

Intramolecular Michael Reactions by Iron(III) Catalysis,

Tetrahedron 2000, 56, 1339-1344.

29

Jens Christoffers, Heiko Oertling, Michael Leitner

Novel Poly-Michael Reactions by Iron(III) Catalysis,

Synlett 2000, 349-350.

28

Jens Christoffers, Ulrich Rößler, Thomas Werner

Construction of Quaternary Stereo­centers by Nickel-Catalysis of Asymmetric Michael-Reactions,

Eur. J. Org. Chem. 2000, 701-705.

27

Jens Christoffers

2-(3-Oxobutyl)cyclopentanone-2-carboxylic acid ethyl ester,

Org. Synth. 2002, 78, 249-253.

26

Jens Christoffers

Novel Manganese-Catalyzed α-Oxidation of Cyclic β-Keto Esters with Molecular Oxygen,

J. Org. Chem. 1999, 64, 7668-7669.

25

Jens Christoffers, Alexander Mann

The Vinylogous Michael Reaction - A Novel Perspective for Biaryl Syntheses,

Eur. J. Org. Chem. 1999, 2511-2514.

24

Jens Christoffers

Dipeptides from Methionine and S-Methylcysteine as Chiral Ligands for Asymmetric Michael Reactions,

J. Prakt. Chem. 1999, 341, 495-498.

23

Jens Christoffers, Ulrich Rößler

Novel bi- and tridentate phosphane and thioether ligands derived from chiral α-hydroxy acids,

Tetrahedron: Asymmetry 1999, 10, 1207-1215.

22

Jens Christoffers, Alexander Mann

Novel Diamino and Diimino Thioethers - Chiral Tridentate Ligands for Asymmetric Michael Reactions?

Eur. J. Org. Chem. 1999, 1475-1479.

21

Jens Christoffers, Alexander Mann, Joachim Pickardt

Synthesis of Chiral Tridentate Oxazolines with Thioether and Heteroaryl Donor Groups and their Application in the Catalysis of Asymmetric Michael Reactions,

Tetrahedron 1999, 55, 5377-5388.

20

Jens Christoffers

Iron(III) catalysis of an intramolecular Michael reaction,

Tetrahedron Lett. 1998, 39, 7083-7084.

19

Jens Christoffers, Ulrich Rößler

Novel synthesis of chiral, enantiomerically pure thiodiglycoles and diglycoles,

Tetrahedron: Asymmetry 1998, 9, 2349-2357.

18

Jens Christoffers

Transition-Metal Catalysis of the Michael Reaction of 1,3-Dicarbonyl Compounds and Acceptor-Activated Alkenes,

Eur. J. Org. Chem. 1998, 1259-1266.

17

Jens Christoffers

An Enone-Dienol Tautomerism and an Iron(III)-Catalyzed Dimerization of Cyclo­alkenone-2-carboxylates,

J. Org. Chem. 1998, 63, 4539-4540.

16

Jens Christoffers

An Unusual Acyliminium Cyclization and Other Drawbacks during an Attempted Synthe­sis of a Chiral Primary α-Phosphinoalkanamine,

Helv. Chim. Acta 1998, 81, 845-852.

15

Jens Christoffers

Facile nBu4NF Mediated Benzylation of Congested 1,3-Diketones,

Synth. Commun. 1999, 29, 117-122.

14

Jens Christoffers

A Vinylogous Donor in an Iron(III)-Catalysed Michael Reaction and an Enone-Dienol Tauto­merism,

Eur. J. Org. Chem. 1998, 759-761.

13

Jens Christoffers

Novel chemoselective and diastereoselective iron(III)-catalysed Michael reactions of 1,3-dicarbonyl compounds and enones,

J. Chem. Soc., Perkin Trans. 1 1997, 3141-3149.

12

Jens Christoffers

Synthesis of Novel C2-Symmetrical Diamino Thioethers Derived from Amino Acids,

Liebigs Ann./Recueil 1997, 1353-1358.

11

Jens Christoffers

Iron(III) catalysis of the Michael reaction of 1,3-dicarbonyl compounds and enones,

Chem. Commun. 1997, 943-944.

10

Jens Christoffers, Robert G. Bergman

Zirconocene-alumoxane (1:1) - a catalyst for the selective dimerization of α‑ole­fins,

Inorg. Chim. Acta 1998, 270, 20-27.

9

Jens Christoffers, Robert G. Bergman

Catalytic Dimerization Reactions of α-Olefins and α,ω-Dienes with Cp2ZrCl2/Poly­(methy­lalumoxane): Formation of Dimers, Carbocycles, and Oligomers,

J. Am. Chem. Soc. 1996, 118, 4715-4716.

8

Jens Christoffers, Robert G. Bergman

Stereoselektive Synthese chiraler Zirconocene aus disubstituierten, donorfunktionali­sierten Cyclopentadien-Derivaten über helicale Chelatkomplexe,

Angew. Chem. 1995, 107, 2423-2425;

Stereoselective Synthesis of Chiral Zirconocenes from Doubly Substituted, Donor Functionalized Cyclopentadienes via Helical Chelate Complexes,

Angew. Chem. Int. Ed. Engl. 1995, 34, 2266-2267.

7

Karl Heinz Dötz, Carmen Christoffers, Jens Christoffers, Dirk Böttcher, Martin Nieger, Sirpa Kotila

Vinylidene and Methoxy(alkynyl)carbene Molybdenum Complexes: Competitive For­ma­tion During Fischer Carbene Complex Synthesis and Crystal Structure Determi­na­tion,

Chem. Ber. 1995, 128, 645-648.

6

Jens Christoffers, Karl Heinz Dötz

Synthesis of 5,5'-Diphenyl-2,2'-bifuran, a Biaryl Compound with Remarkable Fluores­cence Properties,

Chem. Ber. 1995, 128, 641-643.

5

Jens Christoffers, Karl Heinz Dötz

Oxacycloalkenyliden-Komplexe von Chrom, Molybdän und Wolfram: Synthese, Anellierung mit Alkinen und Diels-Alder-Reaktionen mit Dienen,

Chem. Ber. 1995, 128, 157-161.

4

Jens Christoffers, Karl Heinz Dötz

Synthesis of (Allyloxy)(alkynyl)carbene Complexes and Their Reaction with Octa­car­bonyldicobalt: An Unprecedented Retro-Fischer Reaction,

Organometallics 1994, 13, 4189-4193.

3

Jens Christoffers, Karl Heinz Dötz

Novel Synthesis of Oxacycloalkenylidene Complexes and their Annulation to an Acyl Hydroquinone Derivative,

J. Chem. Soc., Chem. Commun. 1993, 1811-1812.

2

Karl Heinz Dötz, Jens Christoffers

Carben-Liganden in intramolekularen Pauson-Khand-Reaktionen,

J. Organomet. Chem. 1992, 426, C58-C61.

1

Jens Christoffers

Kinetik radioaktiver Zerfallsreihen,

Junge Wissenschaft 1986, 1, 16-20.

 

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