A novel synthesis of unsaturated spiro compounds based on reactions of bifunctional organometallic reagents.
作者:Perséphone Canonne、Raynald Boulanger、Paul Angers
DOI:10.1016/s0040-4039(00)79411-1
日期:1991.10
Z-allylic dibromides regio- and stereoselectively prepared were reacted with the sodium enolate of ethyl acetoacetate or di(α-ethoxyvinyl)cuprate to yield, after hydrolysis, and decarboxylation in the case where the enolate of ethylacetoacetate was the nucleophile, the corresponding ketones. After reduction and bromination, the products were converted into the appropriate organometallic compounds and
将区域选择性和立体选择性制备的Z-烯丙基二溴化物与乙酰乙酸乙酯或二(α-乙氧基乙烯基)乙酸铜的烯醇钠反应,水解后水解,在乙酰乙酸乙酯的烯醇盐为亲核试剂的情况下脱羧,得到相应的酮。还原和溴化后,将产物转化为适当的有机金属化合物,并与选定的环状酸酐和β-卤代-α,β-不饱和环状酮反应。如此获得的螺环化合物是合成天然螺环倍半萜烯的关键中间体。