REGIOSELECTIVE SYNTHESIS OF 4-CHLORO-2-THIOPHENECARBOXYLIC ACID
    7.
    发明申请
    REGIOSELECTIVE SYNTHESIS OF 4-CHLORO-2-THIOPHENECARBOXYLIC ACID 审中-公开
    4-氯-2-羟基苯甲酸的间位选择性合成

    公开(公告)号:WO1994012505A1

    公开(公告)日:1994-06-09

    申请号:PCT/US1993008613

    申请日:1993-09-17

    Inventor: PFIZER INC.

    CPC classification number: C07D409/06 C07D333/38 C07F7/0803

    Abstract: 4-Chloro-2-thiophenecarboxylic acid is made by forming a compound of formula (Ia), wherein R is (C1-C6) alkyl, phenyl, or benzyl; converting the compound to a compound of formula (IVa); and removing the silyl group R3Si-. The product is useful as an intermediate in making pharmaceutical products.

    Abstract translation: 通过形成其中R 3为(C 1 -C 6)烷基,苯基或苄基的式(Ia)化合物制备4-氯-2-噻吩羧酸。 将化合物转化为式(Ⅳa)化合物; 并除去甲硅烷基R3Si-。 该产品作为制造药品的中间体是有用的。

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