The Syntheses of the Corticoid Side Chain. III. A New Synthesis of 17α,21-Dihydroxypregna-1,4-diene-3,20-dione 17,21-Diacetate from Androsta-1,4-diene-3,17-dione
作者:Issei Nitta、Shinichiro Fujimori、Toshio Haruyama、Shinya Inoue、Hiroaki Ueno
DOI:10.1246/bcsj.58.981
日期:1985.3
An efficient synthesis of 17α,21-dihydroxypregna-1,4-diene-3,20-dione 17,21-diacetate (10) from androsta-1,4-diene-3,17-dione (1), a biodegradation product of cholesterol, is described, which involves the ethynylation of the 17-ketone, the epimerization of the 17α-ethynyl group and conversion of the ethynyl group to the 20-keto pregnane. Overall yield is relatively high (about 54%) and 10 will be a
一种生物降解产物 androsta-1,4-diene-3,17-dione (1) 有效合成 17α,21-dihydroxypregna-1,4-diene-3,20-dione 17,21-diacetate (10)描述了胆固醇的转化,包括 17-酮的乙炔化、17α-乙炔基的差向异构化和乙炔基向 20-酮孕烷的转化。总产率相对较高(约 54%),10 将是泼尼松龙的潜在中间体。