In compounds of the Westphalen type the substituent in position 6 has been removed: the 6β-hydroxyl in 3β,17β-dibenzoyloxy-5-methyl-5β-estr-9-en-6β-ol (1) by oxidation to ketone 2 and Huang Minlon reduction, the 6β-chlorine atom in 3β-acetoxy-6β-chloro-5-methyl-5β-estr-9-en-17-one (13) by reduction with tributyltin hydride. Androstenedione, testosterone and methyltestosterone analogues 4, 5, and 16, respectively, were prepared from 3β,17β-dihydroxy-5-methyl-5β-estr-9-ene (3) by partial oxidation or partial acylation followed by oxidation. Alternatively, these derivatives were prepared from compound 13 without the need of partial transformations.
在Westphalen类化合物中,位置6的取代基已被去除:通过氧化成酮2和Huang Minlon还原,将3β,17β-二苯甲酰氧基-5-甲基-5β-雌-9-烯-6β-醇(1)中的6β-羟基去除;通过三丁基锡氢化还原,将3β-乙酰氧基-6β-氯-5-甲基-5β-雌-9-烯-17-酮(13)中的6β-氯原子去除。从3β,17β-二羟基-5-甲基-5β-雌-9-烯-9-烯(3)通过部分氧化或部分酰化后氧化,制备出雄烯二酮、睾酮和甲基睾酮类似物4、5和16。或者,这些衍生物可以从化合物13中制备而成,无需进行部分转化。