Synthesis of 4-d1-testosterone and 4-d1-androstenedione.
作者:TOSHIO NAMBARA、SHIGEO IKEGAWA、HIDEKI ISHIDA
DOI:10.1248/cpb.24.2486
日期:——
In order to clarify the stereochemistry at C-4 in enzymatic saturation of Δ4-3-ketoste-roids synthesis of 4-deuterated testosterone and androst-4-ene-3, 17-dione (XVIII, XIX) has been undertaken. The key intermediate leading to the required substrate, 4α-d1-5α-androstane-3β, 4β, 17β-triol 3, 17-bis (dimethyl-tert-butylsilyl) ether (XVI), was prepared by stereospecific reduction with lithium aluminum deuteride from 3β, 17β-dihydroxy-5α-androstan-4-one disilyl ether (XIII), which was readily obtainable from androst-4-ene-3β, 17β-diol disilyl ether (XI) by hydroboration, followed by oxidation with chromium trioxide-pyridine complex. Dehydration of XVI with phosphorus oxychloride in pyridine provided the Δ4 olefine (XVIIb) which on chromium trioxide oxidation was led to the desired compounds. Reductive dehalogenation of 4-bromotestosterone silyl ether (II) with lithium aluminum deuteride and subsequent oxidation with chromium trioxide-pyridine complex afforded 4-d1-testosterone silyl ether (VII) in which the deuterium incorporation, however, proved to be unsatisfactory.
为了弄清Δ4-3-酮基类固醇酶饱和合成 4-氚代睾酮和雄甾-4-烯-3,17-二酮(XVIII,XIX)过程中 C-4 的立体化学结构,我们进行了一项研究。所需底物 4α-d1-5α 雄甾烷-3β,4β,17β-三醇 3,17-双(二甲基-叔丁基硅基)醚(XVI)的关键中间体是用氘化铝锂从 3β、17β-二羟基-5α-雄甾烷-4-酮二硅基醚(XIII)的立体还原,然后用三氧化铬-吡啶络合物进行氧化,制备了 3β,17β-二羟基-5α-雄甾烷-4-酮二硅基醚(XVI)。XVI 在吡啶中与氧氯化磷脱水后得到 Δ4 烯烃(XVIIb),再用三氧化铬氧化后得到所需的化合物。用氘化铝锂对 4-溴睾酮硅基醚 (II) 进行还原脱卤反应,然后用三氧化铬-吡啶络合物进行氧化,得到了 4-d1-睾酮硅基醚 (VII)。