Process for preparing 2-substituted 5-formylthiazoles
    1.
    发明授权
    Process for preparing 2-substituted 5-formylthiazoles 失效
    制备2-取代的5-甲酰基噻唑的方法

    公开(公告)号:US06372913B1

    公开(公告)日:2002-04-16

    申请号:US09135134

    申请日:1998-08-17

    申请人: Helmut Kraus

    发明人: Helmut Kraus

    IPC分类号: C07D27724

    CPC分类号: C07D277/34 C07D277/36

    摘要: 2-substituted 5-formylthiazoles are prepared in an advantageous manner by reacting halogenomalonaldehydes in the presence of a solvent and a C1-compound of the formula (III) in which X represents oxygen or sulfur and R1 is as defined in the description, the reaction mixture comprising less than 5% by weight of water.

    摘要翻译: 2-取代的5-甲酰基噻唑以有利的方式通过卤代芳醛在溶剂存在下与其中X代表氧或硫的式(III)的C1化合物反应制备,R 1如说明书中所定义,反应混合物包含 小于5重量%的水。

    Process for the preparation of thiazole intermediate
    2.
    发明授权
    Process for the preparation of thiazole intermediate 失效
    制备噻唑中间体的方法

    公开(公告)号:US06833459B2

    公开(公告)日:2004-12-21

    申请号:US10309812

    申请日:2002-12-05

    IPC分类号: C07D27724

    CPC分类号: C07D277/24

    摘要: The present invention provides a process for the preparation of 4-methyl-5-formyl-thiazole of the formula (I) which comprises reducing the thiazole ester of the formula (III) to thiazole alcohol of the formula (IV), using sodium borohydride in the presence of AlCl3 in a solvent and oxidising using an oxidizing agent the thiazole alcohol of the formula (IV) to obtain 4-methyl-5-formyl-thiazole of the formula (I).

    摘要翻译: 本发明提供制备式(I)的4-甲基-5-甲酰基 - 噻唑的方法,其包括使用硼氢化钠将式(III)的噻唑酯还原成式(IV)的噻唑醇 在AlCl 3存在下在溶剂中并使用氧化剂将式(Ⅳ)的噻唑醇氧化得到式(I)的4-甲基-5-甲酰基 - 噻唑。

    Synthesis of thiazolium compounds
    6.
    发明授权
    Synthesis of thiazolium compounds 失效
    噻唑化合物的合成

    公开(公告)号:US06506902B2

    公开(公告)日:2003-01-14

    申请号:US09821846

    申请日:2001-03-29

    申请人: Dilip Wagle

    发明人: Dilip Wagle

    IPC分类号: C07D27724

    CPC分类号: C07D277/22

    摘要: Provided is a method of synthesizing a compound of formula I, comprising: (a) reacting a compound of formula II wherein R1 and R2 are independently hydrogen, hydroxy(C1-C2)alkyl, or (C1-C2)alkyl with, a compound of formula III wherein R3, R4, and R5 are each independently of each other hydrogen, (C1-C3)alkyl, (C1-C3)alkoxy, or halogen; and X is a leaving group, in a solvent having a dielectric constant at 20° C. of at least 30 but no more than 40; and (b) obtaining the compound I.

    摘要翻译: 本发明提供了合成式I化合物的方法,其包括:(a)使式II化合物与其中R1和R2独立地是氢,羟基(C1-C2)烷基或(C1-C2)烷基) 式III其中R 3,R 4和R 5各自独立地为氢,(C 1 -C 3)烷基,(C 1 -C 3)烷氧基或卤素; 并且X为离去基团,其介电常数在20℃至少为30但不超过40的溶剂中; 和(b)获得化合物I.