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    • 3. 发明公开
    • 디플루오로메틸피라졸릴 카르복실레이트의 제조 방법
    • 制备二氟甲基吡唑啉羧酸酯的方法
    • KR1020090080108A
    • 2009-07-23
    • KR1020097011360
    • 2007-11-02
    • 바스프 에스이
    • 라크,미하엘스미트,세바스티안,피어뢰르,산드라카일,미하엘디에츠,요헨라인하이머,요아힘그로테,토마스지르케,토마스로만,얀,클라스수코프,마르틴
    • C07D237/04C07F7/04
    • C07D231/14
    • The present invention relates to a process for preparing difluoromethyl-substituted pyrazol-4-yl carboxylates of the formula (I) in which R1 is C1-C8-alkyl, C3-C8-cycloalkyl, C1-C4-alkoxy-C1-C4-alkyl, etc.; and R2 is hydrogen, C1-C4-alkyl, benzyl or phenyl, wherein a) a compound of the general formula (II) in which X is fluorine, chlorine, or bromine, R1 has one of the definitions given above, and R4 is C1-C8-alkyl, C3-C8-cycloalkyl, C2-C8-alkenyl, benzyl or phenyl, is reacted with a silane compound of the general formula R3nSiCl(4-n) in which n is 1, 2 or 3 and the substituents R3 are each independently selected from C1-C8-alkyl and phenyl, and with a metal which is selected from the metals of groups 1, 2, 3, 4 and 12 of the periodic table and has a redox potential of less than-0.7 V, based on a standard hydrogen electrode (at 25°C and 101.325 kPa); and b) the reaction mixture from step a) is reacted with a compound of the general formula (III) in which R2 has one of the definitions given above.
    • 本发明涉及式(I)的二氟甲基取代的吡唑-4-基羧酸盐的制备方法,其中R 1是C 1 -C 8 - 烷基,C 3 -C 8 - 环烷基,C 1 -C 4 - 烷氧基-C 1 -C 4 - 烷基等; 并且R 2是氢,C 1 -C 4 - 烷基,苄基或苯基,其中a)通式(II)的化合物,其中X是氟,氯或溴,R 1具有上面给出的定义之一,R 4是 C 1 -C 8 - 烷基,C 3 -C 8 - 环烷基,C 2 -C 8 - 烯基,苄基或苯基与通式R 3 n SiCl(4-n)的硅烷化合物反应,其中n为1,2或3, R 3各自独立地选自C 1 -C 8烷基和苯基,以及选自元素周期表第1,2,3,4和12族的金属的金属,并且具有小于-0.7V的氧化还原电位 ,基于标准氢电极(25℃和101.325kPa); 和b)来自步骤a)的反应混合物与其中R2具有上述定义之一的通式(III)的化合物反应。