Epoxypregnadienes, hydroxypregnatrienes, process for their preparation and process for their conversion to precursors of useful anti-inflammatory agents
申请人:THE UPJOHN COMPANY
公开号:EP0007766A2
公开(公告)日:1980-02-06
21-Hydroxypregna-1,4,17(20)- trien- 3-one 21- acylates are converted to novel 17a, 20a-epoxypregna-1,4- dien-3-one 21-acylates (I) using a peracid, compounds 1 are converted to novel 21-hydroxypregna-1,4,16- trien-3-one 21-acylates (II) with a hydrogen halide, and compounds II are converted to 20, 21-dihydroxypregna-1,4,16- trien-3-ones (III) by hydrolysis. Compounds III are useful intermediates in the production of anti-inflammatory agents.
使用过酸将 21-羟基孕甾-1,4,17(20)-三烯-3-酮 21-酰化物转化为新型 17a,20a-环氧孕甾-1,4-二烯-3-酮 21-酰化物 (I),使用卤化氢将化合物 1 转化为新型 21-羟基孕甾-1、4,16-三烯-3-酮 21-酰化物 (II),化合物 II 通过水解转化为 20,21-二羟基孕甾-1,4,16-三烯-3-酮 (III)。化合物 III 是生产抗炎剂的有用中间体。