16-Methylene-17-keto steroids (III) are transformed to the corresponding 16-methylene-17.alpha.-hydroxyprogesterones (VII) which are intermediates useful in the production of betamethasone, diflorasone diacetate and melengesterol acetate.
16-Methylene-17-keto-steroids are transformed to the corresponding 16-methylene-17a-hydroxyprogesterones which are intermediates useful in the production of betamethasone, diflorasone diacetate and melengesterol acetate. 17a-Hydroxy-6, 16-dimethylene-pregn-4-ene-3, 20-dione is simultaneously isomerized and acylated to 17a-hydroxy-6-methyl-16-methylenepregna-4, 6-diene-3, 20-dione 17-acetate.
16-Sulfinylmethyl-steroids, their preparation and use
申请人:THE UPJOHN COMPANY
公开号:EP0179496A1
公开(公告)日:1986-04-30
Novel 16-sulfinylmethyl-steroids are prepared by reaction of the corresponding 16-methylene-17β-hydroxy-steroid with a sulfenylating agent, and are converted to corresponding 16-methylene-17a-hydroxy-progesterones by reaction with a thiophile. 17a-Hydroxy-6,16-dimethylene-pregn-4- ene-3,20-dione is simultaneously isomerised and acylated to give melengestrol acetate.