Asymmetric photodeconjugation of ammonium ene-carboxylates:: temperature effects and evidence for the α-carbon of the dienolic species as a latent trigonal centre

被引：29

作者：

Hénin, F ^{[1
]}

Létinois, S ^{[1
]}

Muzart, J ^{[1
]}

机构：

[1] Univ Reims, CNRS, Unite Mixte Rech React Select & Applicat, F-51687 Reims 2, France

来源：

TETRAHEDRON-ASYMMETRY | 2000年 / 11卷 / 09期

关键词：

D O I：

10.1016/S0957-4166(00)00151-8

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The diastereoselective photodeconjugation of CH2Cl2 solutions of enantiopure ammonium ene-carboxylates was studied and the results compared with those of the enantioselective photodeconjugation of ene-esters in the presence of catalytic amounts of chiral aminoalcohols. We have observed a significant entropic effect and shown that a C-beta control of the selectivity is operative in the asymmetric protonation of the photodienolic species, (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：2037 / 2044

页数：8

共 44 条

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