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    • 9. 发明授权
    • Process for the preparation of 4-sulfinyl-pyrazole derivatives
    • 4-亚磺酰基 - 吡唑衍生物的制备方法
    • US08476459B2
    • 2013-07-02
    • US13504574
    • 2010-10-26
    • Alexander KortePaul Hornung
    • Alexander KortePaul Hornung
    • C07D231/44
    • C07D231/44
    • The present invention relates to a novel process for the preparation of a compound of formula (I), wherein R1, R2, R3, R4 and R5 are each independently selected from hydrogen, halogen, C1-C4-alkyl, C1-C4-haloalkyl, C1-C4-alkoxy, C1-C4-haloalkoxy, nitro, cyano, and pentafluorothio; R6 is C1-C4-alkyl, or C1-C4-haloalkyl; by oxidation of a compound of formula (II) with an oxidation agent selected from trifluoroperacetic acid and trichloroperacetic acid in the presence of a catalyst selected from hydroxides, oxides, sulfates, acetates or trifluoroacetates of lithium, magnesium, calcium, strontium, barium, titanium (IV), zinc (II) and manganese (II).
    • 本发明涉及一种制备式(I)化合物的新方法,其中R 1,R 2,R 3,R 4和R 5各自独立地选自氢,卤素,C 1 -C 4 - 烷基,C 1 -C 4 - 卤代烷基 ,C 1 -C 4 - 烷氧基,C 1 -C 4卤代烷氧基,硝基,氰基和五氟硫基; R6是C1-C4-烷基或C1-C4卤代烷基; 通过在选自三氟乙酸和三氯过乙酸的氧化剂中,在选自锂,镁,钙,锶,钡,钛的氢氧化物,氧化物,硫酸盐,乙酸盐或三氟乙酸盐的催化剂存在下,使式(Ⅱ)化合物氧化 (IV),锌(II)和锰(II)。