发明授权
US5760256A Process for the production of 21-acyloxy-4,9 (11),16-pregnatriene-3,20-diones 失效
生产21-酰氧基-4,9(11),16-孕三烯-3,20-二酮的方法

Process for the production of 21-acyloxy-4,9
(11),16-pregnatriene-3,20-diones
摘要:
A process for the production of a compound of the formula ##STR1## wherein R.sub.1 is acyl of 1 to 8 carbon atoms,. The compound is formed by the reduction of an intermediary to form an alcohol, epoxidation and hydrolyzation of the alcohol to form a compound of formula ##STR2## followed by the acylation of the hydroxy functions and the elimination of the 17.alpha.-substituent.
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