Syntheses of (20R)- and (20S)-1.ALPHA.,3.BETA.-Diacetoxypregna-5,7-dien-20-ol and 1.ALPHA.,3.BETA.-Diacetoxyandrosta-5,7-dien-17,.BETA.-ol.
作者:Yoji TACHIBANA
DOI:10.1248/cpb.42.2215
日期:——
Syntheses of (20R)- and (20S)-1α, 3β-diacetoxypregna-5, 7-dien-20-ol (1 and 2), important synthetic intermediates for the preparation of 1α, 25-dihydroxy-22-oxa-vitamin D3 derivatives, were achieved starting from pregnenolone. Similar treatment of androst-5-ene-3β, 17β-diol afforded 1α, 3β-diacetoxyandrosta-5, 7-dien-17β-ol.
合成了(20R)-和(20S)-1α, 3β-二乙酰氧基孕烯-5, 7-二烯-20-醇(1和2),这两种化合物是制备1α, 25-二羟基-22-氧-维生素D3衍生物的重要合成中间体,起始原料为孕甾酮。类似的处理对雄甾-5-烯-3β, 17β-二醇也得到了1α, 3β-二乙酰氧基雄烯-5, 7-二烯-17β-醇。