发明授权
- 专利标题: 21,21-Dihalo steroids
- 专利标题(中): 21,21-二卤类固醇
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申请号: US711042申请日: 1976-08-02
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公开(公告)号: US4065452A公开(公告)日: 1977-12-27
- 发明人: Tsung-tee Li , Michael Marx , Lewis J. Throop
- 申请人: Tsung-tee Li , Michael Marx , Lewis J. Throop
- 申请人地址: CA Palo Alto
- 专利权人: Syntex (U.S.A.) Inc.
- 当前专利权人: Syntex (U.S.A.) Inc.
- 当前专利权人地址: CA Palo Alto
- 主分类号: A61K31/57
- IPC分类号: A61K31/57 ; A61P29/00 ; C07J71/00 ; A61K31/58
摘要:
Novel, topically-active anti-inflammatory steroids are represented by the formula ##STR1## wherein X is fluoro, chloro or hydrogen; X.sup.1 is fluoro, chloro, bromo, or hydrogen; X.sup.2 is hydroxy or may be chloro when X.sup.1 is chloro; and X.sup.3 and X.sup.4 are independently fluoro, chloro or bromo. These steroids are prepared by formylating at the 21-position a 16.alpha.,17.beta.-isopropylidenedioxypregna-1,4,9(11)-triene-3,20-dione or the corresponding 21-fluoro compound, halogenating at the 21 position, deformylating, then reacting to add the desired components at the 9.alpha. and 11.beta. positions.
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