专利号:EP-1422235-B1 优先权日:2001-07-26 标题 :Stereoselective method of producing 6alpha-fluoropregnanes and intermediaries 发明人:MURILLO GARRIDO JOSE VICENTE; SILVA GUISASOLA LUIS OCTAVIO; MARTIN JUAREZ JORGE 权利人:RAGACTIVES SL 摘要:6 alpha -fluorpregnanes (I), where the dotted line between positions 1 and 2 represents a single or double bond; R1 is OH, OCOR2, X, SO3R3, or an (R7)(R8)(R9)SiO- group, where X is halogen, R2 and R3 are C1-6 alkyl or phenyl optionally substituted by C1-4 alkyl, and R7, R8 and R9, equal or different, are C1-6 alkyl or phenyl optionally substituted by C1-4 alkyl, can be obtained by means of a high stereoselectivity process comprising reacting a 3-(trisubstituted)silyloxy-pregna-3,5-diene (IV) with a fluorinating agent selected among N-fluorosulfonimides and N-fluorosulfonamides. The 6 alpha -fluorpregnanes (I) are intermediates for the synthesis of steroids useful as anti-inflammatory and anti-asthmatic agents.
专利号:US-4530795-A 优先权日:1984-02-27 标 题 :Process for preparation of 16 α-methyl corticoids from Δ16 -steroids 发明人:HUBER JOEL E 权利人:UPJOHN CO 摘要:This invention discloses a general process for the production of corticoids from respective steroid-type compounds having a double bond from C-16 to C-17. The invention provides a viable alternative synthesis of 17α-hydroxy-progesterones and like corticoids.
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合成参考文献
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