Preparation of tritium-labeled compounds. V. A group of steroids by catalytic reduction of unsaturated precursors with tritium gas
作者:Richard C. Thomas、George J. Ikeda、J. Allan Campbell、Harry Harpootlian
DOI:10.1002/jlcr.2590110115
日期:——
A group of Δ4-3-keto steroids was prepared by catalytic reduction of suitable conjugated diene-3-keto precursors with tritium gas. Thus, 11α-hydroxy-4-pregnene-3,20-dione-7-3H (I), 20α-hydroxy-4-pregnen-3-one-7-3H (II), 6α-methyl-4-pregnene-3,11,20-trione-7-3H (III), 17α-hydroxy-6α-methyl-4-pregnene-3,20-dione-7-3H, acetate (IV), and 17α-hydroxy-6-methyl-3H3-16-methylenepregna-4, 6-diene-3,20-dione, acetate (V) were prepared from 11α-hydroxypregna-4,6-diene-3,20-dione (VI), 20α-hydroxypregna-4,6-dien-3-one (VII), 6-methylpregna-4,6-diene-3,11,20-trione (VIII), 17α-hydroxy-6-methylpregna-4,6-diene-3,20-dione, acetate (IX), and 17α-hydroxy-6-dibromomethylene-16-methylene-4-pregnene-3,20-dione, acetate (X), respectively. In addition, 3α-hydroxy-5β-pregnane-11,20-dione-7-3H, cyclic 20-(trimethylene acetal) (XI) was prepared from I via 11α-hydroxy-5β-pregnane-3,20-dione-7-3H (XII), 5β-pregnane-3,11,20-trione-7-3H (XIII) and 3α-pregnane-11,20-dione-7-3H (XIV).
通过氚气催化还原合适的共轭二烯-3-酮前体,制备了一组Δ4-3-酮类固醇。例如,11α-羟基-4-孕烯-3,20-二酮-7-3H (I)、20α-羟基-4-孕烯-3-酮-7-3H (II)、6α-甲基-4-孕烯-3,11,20-三酮-7-3H (III)、17α-羟基-6α-甲基-4-孕甾-3,20-二酮-7-3H,乙酸酯(IV)和 17α-羟基-6-甲基-3H3-16-亚甲基孕甾-4,6-二烯-3,20-二酮、醋酸酯(V)是由 11α-羟基孕甾-4,6-二烯-3,20-二酮(VI)、20α-羟基孕甾-4,6-二烯-3-酮(VII)和 6-甲基孕甾-4,6-二烯-3,11,20-三酮(VIII)制备而成、17α-hydroxy-6-methylpregna-4,6-diene-3,20-dione, acetate (IX) 和 17α-hydroxy-6-dibromomethylene-16-methylene-4-pregnene-3,20-dione, acetate (X)。此外,由 I 通过 11α-羟基-5β-孕甾-3,20-二酮-7-3H(XII)、5β-孕甾-3,11,20-三酮-7-3H(XIII)和 3α-孕甾-11,20-二酮-7-3H(XIV)制备出 3α-羟基-5β-孕甾-11,20-二酮-7-3H,环 20-(三亚甲基乙缩醛)(XI)。