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    • 4. 发明授权
    • Process for producing thiophene compound and intermediate thereof
    • 制备噻吩化合物及其中间体的方法
    • US08399685B2
    • 2013-03-19
    • US12919394
    • 2009-02-27
    • Kazufumi YanagiharaShingo UmezawaKatsuaki Miyaji
    • Kazufumi YanagiharaShingo UmezawaKatsuaki Miyaji
    • C07D333/32
    • C07D333/32C07C319/14C07C327/32C07C323/56
    • To provide a novel process for producing a 2-aryl-3-hydroxy-4-substituted carbonyl thiophene compound or an intermediate thereof useful as an intermediate for production of medicines and agricultural chemicals.A 2-aryl acetate compound represented by the formula (1): wherein R1 is an aryl group or the like, R4 is a C1-3 alkyl group or the like, and X is a leaving group, is reacted with a thioacetic acid compound to form a thioacetyl compound (3), the thioacetyl compound (3) is reacted with a vinyl ketone compound to form a γ-ketosulfide compound (5), which is cyclized under basic conditions to form a dihydrothiophene compound (6), and the dihydrothiophene compound (6) is oxidized by using an oxidizing agent to produce a 2-aryl-3-hydroxy-4-substituted carbonyl thiophene compound (7).
    • 提供一种生产2-芳基-3-羟基-4-取代的羰基噻吩化合物或其中间体的新方法,其用作制备药物和农药的中间体。 由式(1)表示的2-芳基乙酸酯化合物:其中R 1为芳基等,R 4为C 1-3烷基等,X为离去基,与硫代乙酸化合物 为了形成硫代乙酰基化合物(3),硫代乙酰基化合物(3)与乙烯基酮化合物反应形成γ-酮硫醚化合物(5),其在碱性条件下环化形成二氢噻吩化合物(6),并且 二氢噻吩化合物(6)通过使用氧化剂氧化,得到2-芳基-3-羟基-4-取代的羰基噻吩化合物(7)。