This invention relates to a stereoisomerically pure .DELTA..sup.2 compound of the formula (I): ##STR1## wherein: R.sup.1 is hydrogen or --(C.dbd.O)--R.sup.2, wherein: R.sup.2 is an organic substituent selected from the group consisting of alkyls, alkenyls, alkynyls, cycloalkyls, cycloalkylalkylenes, haloalkyls, aryls, haloaryls and arylalkylenes, and their product by the process of: (a) reacting the 17.beta.-hydroxy group of 17.beta.-hydroxy-5.alpha.-estr-1-en-3-one with dihydropyran to produce the 3-keto-17.beta.-ether; (b) reducing the 3-keto-17.beta.-ether product of step (a) with lithium in ammonia; (c) reacting the product of step (b) with dialkyl chlorophosphate to produce the 3-substituted phosphate; (d) reducing the product of step (c) with lithium and ammonia to produce the .DELTA..sup.2 -protected-17.beta.-ether product; (e) hydrolysis of the produce of step (d) to product the .DELTA..sup.2 -17.beta.-hydroxy compound; (f) oxidizing the 17.beta.-hydroxy product of step (e) to produce the 17-keto compound; (g) reacting the 17-keto derivative of step (f) with acetylene magnesium halide to produce the compound of formula I where R.sup.1 is hydrogen; and (h) optionally reacting the product of step (g) with an acyl halide The invention described herein was made in the course of work under a contract from the U.S. National Institutes of Health No. NOl-HD-2809 of the Department of Health and Human Resources.
本发明涉及一种立体异构纯度的.DELTA..sup.2化合物,
化学式为(I):##STR1##其中:R.sup.1是氢或--(C.dbd.O)--R.sup.2,其中:R.sup.2是从烷基、烯基、炔基、环烷基、环烷烯基、卤代烷基、芳基、卤代芳基和芳基烯基等基团中选择的有机取代基,以及通过以下过程得到的产物:(a)将17.beTA.-羟基-17.beTA.-羟基-5.alpha.-
雌甾-1-烯-3-酮与二氢
吡喃反应,产生3-酮-17.beTA.-醚;(b)用
氨中的
锂还原步骤(a)中的3-酮-17.beTA.-醚产物;(c)将步骤(b)中的产物与二烷基
氯磷酸酯反应,产生3-取代
磷酸酯;(d)用
氨中的
锂还原步骤(c)中的产物,产生.DELTA..sup.2-保护的-17.beTA.-醚产物;(e)
水解步骤(d)的产物,得到.DELTA..sup.2-17.beTA.-羟基化合物;(f)将步骤(e)中的17.beTA.-羟基产物氧化,得到17-酮化合物;(g)将步骤(f)中的17-酮衍
生物与
乙炔镁卤化物反应,得到化合物的
化学式I,其中R.sup.1是氢;以及(h)可选择性地将步骤(g)的产物与
酰卤反应。本发明是在美国国家卫生研究院卫生与人力资源部门的合同N01-HD-2809的合同下进行的工作过程中完成的。