申请人:Schering Corporation
公开号:US04076708A1
公开(公告)日:1978-02-28
3-Oxo-6-unsubstituted-7.alpha.-halogeno-4-dehydro steroids, wherein said halogen is chlorine, bromine or iodine, are prepared by reaction of a 3-oxo-6,7-di-unsubstituted-4,6-bis-dehydro steroid with at least an equimolar quantity of the corresponding hydrogen halide in a non-reactive organic solvent at temperatures no higher than about 30.degree. C, and then are isolated by removal of said solvent and any excess acid at temperatures no higher than about 25.degree. C without subjecting said 3-oxo-6-unsubstituted-7.alpha.-halogeno-4-dehydro steroid to a basic medium. A preferred species of this process is that wherein the starting steroid is a 3,20-dioxo-9-unsubstituted-11-oxygenated-1,4,6-pregnatriene-17,21-diol or ester thereof, preferably a 17,21-di-lower alkanoate or a 17-benzoate 21-lower alkanoate ester thereof, whereby is prepared in good yields a 3,20-dioxo-7.alpha.-halogeno-1,4-pregnadiene-17.alpha.,21-diol or ester thereof, useful as topical anti-inflammatory agents. Also described are novel 3,20-dioxo-7.alpha.-halogeno-4-pregnene-17.alpha.,21-diols and esters thereof having anti-inflammatory activity as well as 3-oxo-7.alpha.-halogeno-17.alpha.-4-pregnene-21,17.beta.-carbolactone aldosterone antagonists.
3-氧代-6-未取代-7α-卤代-4-去氢类固醇,其中所述卤素为氯、溴或碘,通过在非反应性有机溶剂中以不高于约30摄氏度的温度下,将3-氧代-6,7-二未取代-4,6-双去氢类固醇与相应的氢卤酸至少等摩尔量反应制备,并通过在不高于约25摄氏度的温度下去除所述溶剂和任何过量酸而将其分离,而不使所述3-氧代-6-未取代-7α-卤代-4-去氢类固醇暴露于碱性介质。该过程的一种优选物种是,起始类固醇为3,20-二氧代-9-未取代-11-含氧基-1,4,6-孕三烯-17,21-二醇或其酯,优选为17,21-二-较低烷酸酯或其17-苯甲酸酯21-较低烷酸酯,从而以良好产率制备出3,20-二氧代-7α-卤代-1,4-孕二烯-17α,21-二醇或其酯,可用作局部抗炎剂。还描述了具有抗炎活性的新型3,20-二氧代-7α-卤代-4-孕烯-17α,21-二醇及其酯,以及3-氧代-7α-卤代-17α-4-孕烯-21,17β-羟基内酮醛固醇拮抗剂。