Asymmetric Diels-Alder reactions of 5-substituted and 5,6-disubstituted (S)-2-(p-tolylsulfinyl)-1,4-benzoquinones with cyclopentadiene and trans-piperylene

被引:15
作者
Carreño, MC [1 ]
Ruano, JLG [1 ]
Lafuente, C [1 ]
Toledo, MA [1 ]
机构
[1] Univ Autonoma Madrid, Dept Quim Organ C1, E-28049 Madrid, Spain
关键词
D O I
10.1016/S0957-4166(99)00094-4
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
A systematic study of reactions between 5-substituted and 5,6-disubstituted (S)-2-p-tolylsulfinyl-p-benzoquinones and cyclopentadiene or trans-piperylene is reported. Complete regio and pi-facial selectivities are observed. The different behaviours of cyclic and acyclic dienes in the presence of ZnBr2 (cyclopentadiene showed reversed diastereoselection) and the role of BF3 . OEt2 are discussed. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:1119 / 1128
页数:10
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