Stereoselection in thermal asymmetric Diels-Alder reactions. Electronic vs. steric effects
摘要:
Experimental evidence was found for an electronic contribution favoring the cisoid conformation of alpha,beta-unsaturated carbonyl compounds in thermal Diels-Alder transition states.
Stereoselection in thermal asymmetric Diels-Alder reactions. Electronic vs. steric effects
摘要:
Experimental evidence was found for an electronic contribution favoring the cisoid conformation of alpha,beta-unsaturated carbonyl compounds in thermal Diels-Alder transition states.
Enantiogenic synthesis of (R)-(−)-3-hydroxy-1-penten-4-one
作者:Toshinari H. Kurniadi、Rachid Bel Rhlid、Marcel A. Juillerat、Martin Schüler、Ralf G. Berger
DOI:10.1016/s0957-4166(02)00800-5
日期:2003.2
Condensation of pyruvate and acrolein with whole cells of baker's yeast resulted in a mixture of 3-hydroxy-1-penten-4-one 1 and 4-hydroxy-1-penten-3-one 2. The absolute configuration (R) and the enantiomeric excess (ee 72%) of the compound 1 were determined. (C) 2003 Elsevier Science Ltd. All rights reserved.
Stereoselection in thermal asymmetric Diels-Alder reactions. Electronic vs. steric effects
作者:Blanda Stammen、Ulrich Berlage、Richard Kindermann、William S. Sheldrick、Peter Welzel、Wolfgang R. Roth、Manfred Kaiser、Barbara Guenther
DOI:10.1021/jo00050a037
日期:1992.11
Experimental evidence was found for an electronic contribution favoring the cisoid conformation of alpha,beta-unsaturated carbonyl compounds in thermal Diels-Alder transition states.