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    • 8. 发明授权
    • Steroid intermediates and processes for their preparation
    • 类固醇中间体及其制备方法
    • US5502183A
    • 1996-03-26
    • US256812
    • 1994-07-25
    • David R. AndrewsAnantha R. Sudhakar
    • David R. AndrewsAnantha R. Sudhakar
    • A61K31/57A61P31/04C07J1/00C07J5/00C07J7/00C07J13/00C07J21/00C07J31/00C07J41/00C07J43/00C07J51/00
    • C07J5/0053C07J1/0011C07J1/0048C07J13/005C07J13/007C07J21/00C07J31/006C07J41/005C07J41/0094C07J43/003C07J5/0076C07J5/0092C07J51/00C07J7/0085
    • Novel steroids having a 9.alpha.-hydroxy or a 9.alpha.-carbonate substituent can be prepared from 9.alpha.-hydroxyandrostenedione and can be utilized in the synthesis of commercially valuable corticosteroids such as betamethasone. The 9.alpha.-carbonates are prepared by reaction of the corresponding 9.alpha.-hydroxy steroid with a sequence of excess base, trialkylsilyl chloride, alkyl haloformate and alkanol or by using excess base, alkyl haloformate and alkoxide. 9.alpha.-Carbonate-17-keto compounds can be treated with lithium acetylide and a lithium salt to afford the corresponding 17.alpha.-ethynyl-17.beta.-hydroxy-9.alpha.-carbonate. This compound is then esterified with a novel series of reagents to give the 17-ester which can be reduced the corresponding 17-allene. Oxidation of this allene to the bis-epoxide compound, followed by treatment with an alkali metal salt of a carboxylic acid under phase transfer conditions gives the 17.alpha.-hydroxy 21-ester 9.alpha.-carbonate. Elimination of the 9.alpha.-carbonate group affords the a 17.alpha.-hydroxy, 9(11)ene, which in a few subsequent steps can be converted to a variety of commercially important corticosteroids. Novel 9.alpha.-carbonate compounds are prepared in the various reaction steps.
    • PCT No.PCT / US93 / 00211 Sec。 371日期:1994年7月25日 102(e)日期1994年7月25日PCT提交1993年1月26日PCT公布。 公开号WO93 / 15103 日期:1993年8月5日。具有9α-羟基或9α-碳酸酯取代基的新型类固醇可以由9α-羟基雄烯二酮制备,并可用于合成市售有价值的皮质类固醇如倍他米松。 通过相应的9α-羟基类固醇与过量碱,三烷基甲硅烷基氯,烷基卤代甲酸酯和链烷醇的反应或通过使用过量的碱,卤代甲酸烷基酯和醇盐反应制备9α-碳酸酯。 可以用乙炔锂和锂盐处理9α-碳酸酯-17-酮化合物,得到相应的17α-乙炔基-17β-羟基-9α-碳酸酯。 然后将该化合物用新的一系列试剂酯化,得到可以还原相应的17-全烯的17-酯。 将该丙烯氧化成双环氧化合物,然后在相转移条件下用羧酸的碱金属盐处理,得到17α-羟基21-酯9α-碳酸酯。 消除9个α-碳酸酯基提供了17α-羟基,9(11)烯,其在后续的几个步骤中可转化为多种商业上重要的皮质类固醇。 在各种反应步骤中制备新的9种α-碳酸酯化合物。