An efficient route to a key A-ring synthon for 1α,25-dihydroxyvitamin D3 and its analogs
作者:Susumi Hatakeyama、Hiroshi Irie、Takashi Shintani、Yohko Noguchi、Hidetoshi Yamada、Mugio Nishizawa
DOI:10.1016/s0040-4020(01)89344-3
日期:1994.1
An efficient and highly stereoselective route to the Roche's A-ring synthon of 1α,25-dihydroxyvitamin D3 from R-(−)-epichlorohydrin has been developed utilizing double propargylation of R-(−)-epichlorohydrin and palladium(O) catalyzed intramolecular Heck type of reaction of the ω-vinyl-(Z)-iodoalkene as key steps.
利用R -(-)-表氯醇和钯(O)催化的分子内双炔丙基化作用,开发了一种高效且高度立体选择性的路线,该路线从R -(-)-表氯醇到罗氏A环合成子的1α,25-二羟基维生素D 3关键步骤是ω-乙烯基-(Z)-碘烯烃的Heck型反应。