A new approach toward the synthesis of C,D-cis coupled steroid and C,D-cis coupled d-homosteroid skeletons
作者:Svetlana Dratch、Tanya Charnikhova、Florence C.E Sarabèr、Ben J.M Jansen、Aede de Groot
DOI:10.1016/s0040-4020(03)00629-x
日期:2003.6
procedure has been developed for the synthesis of C,D-cis coupled steroid and d-homo steroid skeletons. A Mukaiyama reaction with transfer of the silyl group of the starting silyl enol ether to the enol of the adduct followed by addition of vinyl magnesium bromide to the unprotected carbonyl group leads to adducts which can be cyclized with ZnBr2. The synthesis of functionalized steroid skeletons in overall
已经开发了一种短而有效的程序来合成C,D-顺式偶联的类固醇和d-均质类固醇骨架。Mukaiyama反应是将起始甲硅烷基烯醇醚的甲硅烷基转移至加合物的烯醇,然后将溴化乙烯基镁加成至未保护的羰基,从而生成可以被ZnBr 2环化的加合物。用这种方法可以在四个步骤中以约50%的总产率合成官能化的类固醇骨架。