New Developments in the Asymmetric Stetter ReactionThe author thanks the Fonds der Chemischen Industrie for a Liebig fellowship.
نویسنده
چکیده
Processes mediated by small nucleophilic catalysts are currently experiencing a renaissance. In addition to competing with well-established metal-catalyzed reactions, there is a tempting opportunity to invert conventional reactivity patterns by exploiting the concept of polarity reversal (umpolung). Following this strategy, aldehydes can be turned into acylanion equivalents through covalent activation with suitable nucleophiles (Scheme 1). Among
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sche Verschiebung des Protonensignals von 9,8 ppm entspricht. Dieser Wert stimmt sehr gut mit den Ergebnissen analoger Betrachtungen an Pyridinderivaten 8 und mit verschiedenen Literaturwerten 9 1 1 überein. Die Durchführung dieser Untersuchungen wurde durch Mittel der Deutschen Forschungsgemeinschaft und des Fonds der Chemischen Industrie unterstützt, wofür an dieser Stelle herzlich gedankt wird.
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1 F. F. SEELIG, J. Theoret. Biol. 31, 355 [1971]. 2 F. F. SEELIG, J. Theoret. Biol. 32, 93 [1971]. 3 F. C. FRANK, Biochim. biophysica Acta [Amsterdam] 11, 459 [1953]. 4 H. KACSER, Symp. Soc. exp. Biol. 14, 13 [I960]. 5 H. KACSER, in: Biological Organization at the Cellular and Supercellular Level (R. J. C. HARRIS, ed.), p. 25, Academic Press, New York 1963. by the Fonds der Chemischen Industrie...
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4766 [*] Dr. A. Marx, Dipl. Chem. M. Strerath Kekulÿ Institut f ̧r Organische Chemie und Biochemie Universit‰t Bonn Gerhard Domagk Strasse 1, 53121 Bonn (Germany) Fax: (þ 49)228 73 5388 E mail: a.marx@uni bonn.de [**] This work was supported by the DFG, the Volkswagenstiftung, and the Fonds der Chemischen Industrie. We thank Prof. Dr. M. Famulok for his continuing support and Prof. Dr. A. Pingou...
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