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Puke C, Erker G, Aust NC, Würthwein EU, Fröhlich R. Evidence for a Continuous Transition between Thiaphosphetane and Betaine-Type Structures in the Thio-Wittig Reaction. J Am Chem Soc 1998. [DOI: 10.1021/ja9720669] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Carsten Puke
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40 D-48149 Münster, Germany
| | - Gerhard Erker
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40 D-48149 Münster, Germany
| | - Nicola C. Aust
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40 D-48149 Münster, Germany
| | - Ernst-Ulrich Würthwein
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40 D-48149 Münster, Germany
| | - Roland Fröhlich
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40 D-48149 Münster, Germany
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Krol A, Würthwein EU. First X-ray crystal structure and NMR spectroscopic analysis of a lithiated 1,2-diazapentadiene. Chem Commun (Camb) 1998. [DOI: 10.1039/a708151k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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153
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Affiliation(s)
- Herbert Mayr
- Contribution from the Institut für Organische Chemie der Ludwig-Maximilians-Universität München, Karlstrasse 23, D-80333 München, Germany, and the Organisch-chemisches Institut der Westfälischen Wilhelms-Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Armin R. Ofial
- Contribution from the Institut für Organische Chemie der Ludwig-Maximilians-Universität München, Karlstrasse 23, D-80333 München, Germany, and the Organisch-chemisches Institut der Westfälischen Wilhelms-Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Ernst-Ulrich Würthwein
- Contribution from the Institut für Organische Chemie der Ludwig-Maximilians-Universität München, Karlstrasse 23, D-80333 München, Germany, and the Organisch-chemisches Institut der Westfälischen Wilhelms-Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Nicola C. Aust
- Contribution from the Institut für Organische Chemie der Ludwig-Maximilians-Universität München, Karlstrasse 23, D-80333 München, Germany, and the Organisch-chemisches Institut der Westfälischen Wilhelms-Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
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154
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Nielsen MF, Batanero B, Löhl T, Schäfer HJ, Würthwein EU, Fröhlich R. Enantioselective Cathodic Reduction of 4-Methylcoumarin: Dependence of Selectivity on Reaction Conditions and Investigation of the Mechanism. Chemistry 1997. [DOI: 10.1002/chem.19970031216] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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155
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Könemann M, Erker G, Fröhlich R, Würthwein EU. Structure and Chemical Behavior of an η5-(1-Azapentadienyl)lithium Derivative Generated by Deprotonation Reactions Starting from 9-(N-tert-Butylaminomethyl)fluorene or 6-(tert-Butylamino)dibenzofulvene. J Am Chem Soc 1997. [DOI: 10.1021/ja964439w] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Martin Könemann
- Contribution from the Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Gerhard Erker
- Contribution from the Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Roland Fröhlich
- Contribution from the Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Ernst-Ulrich Würthwein
- Contribution from the Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
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156
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Böttger G, Geisler A, Fröhlich R, Würthwein EU. Trifluoromethanesulfonic Anhydride Induced Cleavage of a Bis(iminomethane) Compound: A New Access to a 1,3-Diaryl-2-azaallenium Triflate and a N-((Trifluoromethyl)sulfonyl)methanimine. Synthesis, Structures, and Quantum Chemical Calculations. J Org Chem 1997. [DOI: 10.1021/jo970551g] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Guido Böttger
- Organisch-Chemisches Institut der Westfälischen, Wilhelms-Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Andre Geisler
- Organisch-Chemisches Institut der Westfälischen, Wilhelms-Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Roland Fröhlich
- Organisch-Chemisches Institut der Westfälischen, Wilhelms-Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Ernst-Ulrich Würthwein
- Organisch-Chemisches Institut der Westfälischen, Wilhelms-Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
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Aust NC, Fröhlich R, Hecht J, Würthwein EU. Unsaturated Hetero Chains, VI. ω-alkoxy- and ω-Amino-Substituted Oligonitriles – Synthesis, Structures, and Reactivity. ACTA ACUST UNITED AC 1997. [DOI: 10.1002/jlac.199719970742] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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158
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Monsees A, Laschat S, Kotila S, Fox T, Würthwein EU. Diastereoselective Synthesis of 1-Hydroxy-Substituted Benzo[b]quinolidines and 11-Hydroxy-Substituted Azepino[l,2-b]isoquinolines via Hetero-Ene Cyclization. European J Org Chem 1997. [DOI: 10.1002/jlac.199719970538] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Monsees A, Laschat S, Kotila S, Fox T, Würthwein EU. Diastereoselective Synthesis of 1-Hydroxy-Substituted Benzo[b]quinolidines and 11-Hydroxy-Substituted Azepino[1,2-b]isoquinolines via Hetero-Ene Cyclization. ACTA ACUST UNITED AC 1997. [DOI: 10.1002/jlac.199719970314] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Grobe J, Le Van D, Broschk B, Hegemann M, Lüth B, Becker G, Böhringer M, Würthwein EU. Synthesis, structure and isomerization of fluorine-containing 1,2-dihydro-1,3-diphosphetes. J Organomet Chem 1997. [DOI: 10.1016/s0022-328x(96)06579-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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161
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Schlachter I, Mattay J, Suer J, Höweler U, Würthwein G, Würthwein EU. Combined quantum chemical and MM-approach to the endo/exo selectivity of diels-alder reactions in polar media. Tetrahedron 1997. [DOI: 10.1016/s0040-4020(96)00957-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Stakemeier H, Würthwein EU. Asymmetric Alkylation of Chiral 2-Azapentadienyl Metal Compounds: Diastereoselective Synthesis of Alkyl-SubstitutedN-Allylimines (2-Aza-1,4-pentadienes). European J Org Chem 1996. [DOI: 10.1002/jlac.199619961117] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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163
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Affiliation(s)
- Roland H. Janke
- Contribution from the Westfälische Wilhelms-Universität Münster, Organisch-Chemisches Institut, Corrensstrasse 40, D-48149 Münster, Germany, and CAOS/CAMM Center, University of Nijmegen, P.O. Box 9060, 6500 GL Nijmegen, The Netherlands
| | - Günter Haufe
- Contribution from the Westfälische Wilhelms-Universität Münster, Organisch-Chemisches Institut, Corrensstrasse 40, D-48149 Münster, Germany, and CAOS/CAMM Center, University of Nijmegen, P.O. Box 9060, 6500 GL Nijmegen, The Netherlands
| | - Ernst-Ulrich Würthwein
- Contribution from the Westfälische Wilhelms-Universität Münster, Organisch-Chemisches Institut, Corrensstrasse 40, D-48149 Münster, Germany, and CAOS/CAMM Center, University of Nijmegen, P.O. Box 9060, 6500 GL Nijmegen, The Netherlands
| | - Jan Hendrik Borkent
- Contribution from the Westfälische Wilhelms-Universität Münster, Organisch-Chemisches Institut, Corrensstrasse 40, D-48149 Münster, Germany, and CAOS/CAMM Center, University of Nijmegen, P.O. Box 9060, 6500 GL Nijmegen, The Netherlands
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Gertzmann R, Fröhlich R, Grehl M, Würthwein EU. Metallated ketenimines: Quinazoline derivatives from base induced dimerization of N-phenyldiethylketenimine. an experimental and theoretical study. Tetrahedron 1995. [DOI: 10.1016/0040-4020(95)00514-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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165
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Würthwein EU. The organic chemistry of aliphatic nitrogen compounds. (Reihe: International Series of Monographs on Chemistry, Vol. 28). VonB. R. Brown. Clarendon Press, Oxford, 1994. 767 S., geb. 145.00 £. – ISBN 0-19-855783-3. Angew Chem Int Ed Engl 1995. [DOI: 10.1002/ange.19951071231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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166
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Würthwein EU. Book Review: The Organic Chemistry of Aliphatic Nitrogen Compounds.(International Series of Monographs on Chemistry, Vol. 28.) By B. R. Brown. Angew Chem Int Ed Engl 1995. [DOI: 10.1002/anie.199512492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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167
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Moldenhauer JP, Möller MH, Rodewald U, Würthwein EU. Unsaturated hetero chains, IV. Synthesis, structure, and protonation of 1-oxa-3-azahexatrienes. European J Org Chem 1995. [DOI: 10.1002/jlac.1995199506144] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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168
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Grahn W, Johannes HH, Rheinheimer J, Knieriem B, Würthwein EU. Halogenated indocyanines: Synthesis, conformational behavior, and light absorption. ACTA ACUST UNITED AC 1995. [DOI: 10.1002/jlac.1995199506142] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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169
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Buhmann M, Würthwein EU, Möller MH, Rodewald U. 1-Oxa-3,5,7,9-tetraazadecapentaene, a Model Oligonitrile with a Helical Structure in the Crystalline State. ACTA ACUST UNITED AC 1994. [DOI: 10.1002/anie.199423371] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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170
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Buhmann M, Möller MH, Rodewald U, Würthwein EU. Ein 1-Oxa-3,5,7,9-tetraazadecapentaen, ein Modell-Oligonitril mit Helixstruktur im kristallinen Zustand. Angew Chem Int Ed Engl 1994. [DOI: 10.1002/ange.19941062216] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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171
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Schleimer R, Würthwein EU. 2,6-Disubstituted 4-Aminopyridines from 1,3-Dialkoxy-2-azapropenylium Salts andN-Methyl-4-piperidone Enamines. ACTA ACUST UNITED AC 1994. [DOI: 10.1002/cber.19941270817] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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172
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Buhmann M, Würthwein EU, Möller MH, Rodewald U. Unsaturated Hetero Chains, II. 1-Oxa-3,5,7-triaza-1,3,5,7-octatetraenes – Syntheses and Structures. ACTA ACUST UNITED AC 1993. [DOI: 10.1002/cber.19931261121] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Buhmann M, Würthwein EU, Möller MH. Darstellung und Struktur von 1-Oxa-3,5-diaza-1,3,5-hexatrienen. Die 1-Oxa-3,5-diaza-1,3,5-hexatrien/2H-1,3,5-Oxadiazin-Tautomerie. ACTA ACUST UNITED AC 1993. [DOI: 10.1002/cber.19931260417] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Würthwein EU. Book Review: The Chemistry of Amidines and Imidates. Vol. 2.(Series: The Chemistry of Functional Groups; series editor: S. Patai). Edited by S. Patai and Z. Rappoport. Angew Chem Int Ed Engl 1992. [DOI: 10.1002/anie.199213951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Würthwein EU. The Chemistry of Amidines and Imidates, Vol. 2. (Reihe: The Chemistry of functional groups; Reihenherausgeber: S. Patai.) Herausgegeben von S. Patai und Z. Rappoport. Wiley, Chichester, 1991. XIV, 918 S., geb. £ 225.00. - ISBN 0-471-92457-1. Angew Chem Int Ed Engl 1992. [DOI: 10.1002/ange.19921040853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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178
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Funke W, Würthwein EU. 1,3-Diethoxy-2-azaindenylium-hexachloroantimonat – ein destabilisiertes, cyclisches 1,3-Dialkoxy-2-azaallyl-Kation. ACTA ACUST UNITED AC 1992. [DOI: 10.1002/cber.19921250826] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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179
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Quast H, Leybach H, Würthwein EU. Thermische Reorganisation und Cycloadditionen eines chiralen, nicht-racemischen Aziridinons (α-Lactams) sowie ab-initio-Berechnungen zur C2H3NO-Energie-Hyperfläche. ACTA ACUST UNITED AC 1992. [DOI: 10.1002/cber.19921250535] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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181
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Fehlhammer WP, Schröder A, Fuchs J, Würthwein EU. Tetraferrioazaallenium — Produkt einer neuartigen Reaktion von koordiniertem CN−. Angew Chem Int Ed Engl 1992. [DOI: 10.1002/ange.19921040512] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Tochtermann W, Vogt C, Peters EM, Peters K, Schnering HGV, Würthwein EU. Synthese mittlerer und großer Ringe, XXX Regioselektive Thermolyse von Oligomethylen-oxaquadricyclan-dicarbonsäureestern zu 3,6-Alkanooxepindicarbonsäureestern – Röntgenstrukturanalysen und semiempirische Rechnungen. ACTA ACUST UNITED AC 1991. [DOI: 10.1002/cber.19911241129] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Unger C, Zimmer R, Reißig HU, Würthwein EU. Deprotonation of 5,6-Dihydro-5-methylene-4H-1,2-oxazines and Regioselective Reactions with Electrophiles. ACTA ACUST UNITED AC 1991. [DOI: 10.1002/cber.19911241021] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Würthwein EU, Kupfer R, Meier S, Krestel M, Allmann R. Zur Struktur vonN-(Dialkoxymethylen)carbonsäureamiden: Kristallstrukturbestimmung, quantenmechanische Berechnungen und spektroskopische Untersuchungen. ACTA ACUST UNITED AC 1988. [DOI: 10.1002/cber.19881210525] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Reichardt C, Yun KY, Massa W, Schmidt RE, Exner O, Würthwein EU. Synthesen mit aliphatischen Dialdehyden, XLII. (2,4,6-Cycloheptatrien-1-yliden)malonaldehyd (8,8-Diformylheptafulven) — Herstellung, Struktur und Reaktionen. ACTA ACUST UNITED AC 1985. [DOI: 10.1002/jlac.198519851008] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Würthwein EU, Kupfer R, Allmann R, Nagel M. Strukturuntersuchungen zum System 1,3-Dialkoxy-2-aza-allenium-Ionen/1,3-Dialkoxy-2-aza-allyl-Kationen. ACTA ACUST UNITED AC 1985. [DOI: 10.1002/cber.19851180917] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Würthwein EU, Kupfer R, Budzelaar PHM, Strobel C, Beck HP. Ein neuer, einfacher Weg zu 2-Aza-allenium-Salzen – Bis(2-adamantyliden)ammonium- hexachloroantimonat. Angew Chem Int Ed Engl 1985. [DOI: 10.1002/ange.19850970418] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Kupfer R, Würthwein EU, Nagel M, Allmann R. 1-Alkoxy-2-azaallenium-Salze: Röntgenographische und quantenmechanische Strukturuntersuchungen. ACTA ACUST UNITED AC 1985. [DOI: 10.1002/cber.19851180223] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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