Intramolecular Diels−Alder Reaction of Chiral Silatrienes: Synthesis of 4a,7,8,8a-Tetrahydro-4-silaisochroman-1-ones
作者:Paulo J. Coelho、Luis Blanco
DOI:10.1002/1099-0690(200009)2000:17<3039::aid-ejoc3039>3.0.co;2-x
日期:2000.9
Intramolecular Diels−Alder reactions of chiral 2-silahexa-3,5-dienyl α,β-unsaturated esters have been found to afford tetrahydro-4-silaisochroman-1-ones in moderate yields. The best diastereoselectivity was achieved in the reaction of silatriene 8c, in which methyl and triisopropylsilyloxymethyl groups are attached to the silicon atom, with an acrylate as the dienophile under EtAlCl2-catalyzed conditions
已发现手性 2-silahexa-3,5-二烯基 α,β-不饱和酯的分子内 Diels-Alder 反应以中等产率提供四氢-4-silaisochroman-1-ones。最好的非对映选择性是在硅三烯 8c 的反应中实现的,其中甲基和三异丙基甲硅烷氧基甲基连接到硅原子上,丙烯酸酯作为在 EtAlCl2 催化条件下的亲二烯体。