4Beta,5beta-epoxy derivatives of 16alpha-hydroxyandrostenedione (2), one of the natural substrates for aromatase, and its 19-oxygenated compounds 4 and 5 were synthesized as mechanistic and catalytic probes for the enzyme reaction. Treatment of 16alpha-bromoandrostenedione (13) or its 19-hydroxy analog 19 which was prepared from 3beta-hydroxy-19-(tert-butyldimethylsiloxy)androst-5-en-17-one (16) in three
合成了作为芳香酶天然底物之一的16α-羟基
雄烯二酮(2)的4Beta,5β-环氧衍
生物及其19-氧化化合物4和5作为酶反应的机理和催化探针。用
H2O2和NaOH分三步处理由3β-羟基-19-(叔丁基二甲基甲
硅烷氧基)androst-5-en-17-one(16)制得的16alpha-
溴雄烯二酮(13)或其19-羟基类似物19然后在NaOH
水溶液中用NaOH控制地碱
水解分别立体地产生4β,5β-环氧-16α-ol15或4β,5β-环氧-16α,19
-二醇22。用
重铬酸吡啶鎓氧化16beta-bromo-4beta,5beta-epoxy-19-ol 21,然后进行受控的碱
水解产生4beta,5beta-epoxy-16alpha-hydroxy-19-al 24。