Synthesis and stereochemistry of the metabolites of 2.ALPHA.-cyano-4.ALPHA.,5.ALPHA.-epoxy-17.BETA.-hydroxyandrostan-3-one.
作者:YUJI MORI、MAKOTO TSUBOI、MAKOTO SUZUKI
DOI:10.1248/cpb.29.2478
日期:——
The preparation of the metabolites of 2α-cyano-4α, 5α-epoxy-17β-hydroxyandrostan-3-one (trilostane) is described, including a novel oxidation with pyridinium chlorochromate. Pyridinium chlorochromate oxidation of trilostane gave the α, β-unsaturated cyanoketone (2), which was hydrogenated to yield metabolite M-1 (3). The compound 3 was converted to the cyano-acetates (11), (12), and (13) and their stereochemistries were established by nuclear magnetic resonance analysis. The cyano-acetate (11) was transformed into M-3 triacetate via M-2 diacetate by successive enol acetylation, epoxidation, acid-catalyzed rearrangement, reduction, and acetylation. The metabolites M-2 and M-3 were established to have the structures 2α-cyano-3α, 16α-dihydroxy-4α, 5α-epoxyandrostan-17-one and 2α-cyano-4α, 5α-epoxy-3α, 16α, -17β-trihydroxyandrostane, respectively.
本文介绍了 2α-氰基-4α,5α-环氧-17β-羟基雄甾烷-3-酮(三苯甲烷)代谢物的制备方法,包括一种新型的氯铬酸吡啶鎓氧化法。氯铬酸吡啶鎓氧化三苯乙烯后得到 α、β-不饱和氰酮(2),氢化后得到代谢物 M-1(3)。化合物 3 被转化成氰基乙酸酯 (11)、(12) 和 (13),并通过核磁共振分析确定了它们的立体化学结构。通过连续的烯醇乙酰化、环氧化、酸催化重排、还原和乙酰化反应,氰基乙酸酯 (11) 通过二乙酸酯 M-2 转化为三乙酸酯 M-3。代谢产物 M-2 和 M-3 的结构分别为 2α-氰基-3α,16α-二羟基-4α,5α-环氧雄甾烷-17-酮和 2α-氰基-4α,5α-环氧-3α,16α,-17β-三羟基雄甾烷。