Highly stereoselective preparation of β-(organotelluro)acroleins and facile stereospecific synthesis of conjugated dienols
作者:Xue-Sheng Mo、Yao-Zeng Huang
DOI:10.1016/0040-4039(95)00580-6
日期:1995.5
Diorganoditellurides 1 (1a R = n-Bu;1b R = Ph), by treated with sodium borohydride, reacted with propargylaldehyde to give corresponding β-(organotelluro)acroleins 2 with high (Z)-stereoselectivity in good yields (2a: Z:E = 89:11; 2b: pure Z-isomer); Tellurides 3, on treatment with n-BuLi, reacted with carbonyl compounds to afford conjugated dienols with retention of olefin geometry in high yields
Diorganoditellurides 1(1A R =正丁基; 1b中R = PH),通过用硼氢化钠处理,用propargylaldehyde反应,得到相应的β-(organotelluro)丙烯醛2与以良好的收率(高(Z)-stereoselectivity 2A:Z: E = 89:11; 2b:纯Z-异构体); 在用正丁基锂处理后,碲化物3与羰基化合物反应,以高收率保留烯烃几何结构的共轭二烯醇。