A New Enantioselective Approach to the Bicyclo[4.4.0]decane and Bicyclo[4.3.0]nonane Systems
作者:Morio Asaoka、Kuniko Nishimura、Hisashi Takei
DOI:10.1246/bcsj.63.407
日期:1990.2
Highly diastereoselective routes to cis-fused bicyclo[4.4.0]decane-2,10-diones and bicyclo[4.3.0]nonane-2,9-diones from 5-trimethylsilyl-2-cyclohexen-1-one (1a) and its 3-methyl derivative were established by utilizing an annulation with ω-(alkoxycarbonyl)alkylzinc reagents. Bicyclo[4.4.0]decane-2,8-dione was obtained diastereoselectively by the double Michael reaction of 1a with dienol silyl ether
从 5-三甲基甲硅烷基-2-环己烯-1-酮 (1a) 和双环 [4.3.0] 壬烷-2,9-二酮的高度非对映选择性路线其 3-甲基衍生物是通过使用 ω-(烷氧基羰基) 烷基锌试剂的环化建立的。双环[4.4.0]癸烷-2,8-二酮通过1a与二烯醇甲硅烷基醚的双迈克尔反应非对映选择性地获得。1a 与环戊二烯的非对映选择性 Diels-Alder 反应得到了一种内加成物,可以认为是一种新的手性环己烯酮合成子,具有很高的光学纯度。