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    • 2. 发明申请
    • PROCESS FOR THE PREPARATION OF PYRIMIDINE COMPOUNDS
    • 制备吡嗪化合物的方法
    • WO1992008703A1
    • 1992-05-29
    • PCT/GB1991001989
    • 1991-11-12
    • IMPERIAL CHEMICAL INDUSTRIES PLCJONES, John, DavidDeBOOS, Gareth, AndrewWILKINSON, PaulCOX, Brian, GeoffreyFIELDEN, Jan, Michael
    • IMPERIAL CHEMICAL INDUSTRIES PLC
    • C07D239/34
    • C07D239/34C07D307/83C07D311/12
    • A process for preparing agrochemical intermediates of formula (I), wherein W is (CH3O)2CH.CHCO2CH3 or CH3O.CH=CCO2CH3; Z is a halogen atom; and R , R , R and R are independently hydrogen, halogen, C1-4 alkyl, C1-4 alkoxy, acetoxy or acyl; the process comprising the steps of: (a) reacting a compound of formula (II), wherein X, R , R , R and R are as defined above, with a compound of formula ROCH3, wherein R is a metal; and, (b) reacting the product of (a) with a compound of formula (III), wherein Z and Z are halogen atoms. A process for the preparation of compounds of formula (II) and compounds of formula (II) themselves. A process for obtaining, in substantially pure form, a compound of formula (II) and compounds of formula (II) themselves. A process for obtaining, in substantially pure form, a compound of formula (II) wherein R , R and R are all hydrogen.
    • 一种制备式(I)的农药中间体的方法,其中W是(CH 3 O)2 CH.CHCO 2 CH 3或CH 3 O.CH = CCO 2 CH 3; Z 1是卤原子; R 1,R 2,R 3和R 4独立地是氢,卤素,C 1-4烷基,C 1-4烷氧基,乙酰氧基或酰基; 该方法包括以下步骤:(a)将其中X,R 1,R 2,R 3和R 4如上定义的式(II)化合物与式 式ROCH 3,其中R是金属; 和(b)使(a)的产物与式(III)化合物反应,其中Z 1和Z 2均为卤素原子。 制备式(II)化合物和式(II)化合物本身的方法。 以基本上纯的形式获得式(II)化合物和式(II)化合物本身的方法。 以基本上纯的形式获得其中R 1,R 2,R 3和R 4均为氢的式(II)化合物的方法。