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    • 3. 发明申请
    • CHEMICAL PROCESS
    • 化学工艺
    • WO2003035636A2
    • 2003-05-01
    • PCT/GB2002/004451
    • 2002-10-02
    • SYNGENTA LIMITEDWHITTON, Alan, JohnJONES, Raymond, Vincent, HeavonHAY, Alastair, Mackie
    • WHITTON, Alan, JohnJONES, Raymond, Vincent, HeavonHAY, Alastair, Mackie
    • C07D311/76
    • C07D311/76C07C51/60C07C51/62C07C57/72C07C57/76
    • A process is described for the preparation of 3-isochromanone having the general formula (I): the process comprising reacting ο-tolylacetic acid with a suitable halogenating agent to form a compound of general formula (III): wherein R is halo, reacting the compound of general formula (III) with a suitable halogenating agent to form a compound of the general formula (II): wherein X is halo; and (a) treating a compound of the general formula (II): with an aqueous base to a pH of 7 to 14 followed by acidification; or (b) adding the compound of the general formula (II) to water with the simultaneous addition of base to maintain the pH between 5 and 8; or (c) treating the compound of the general formula (II)with water or aqueous acid followed by pH adjustment to a pH between 5 and 8. Typically both R and X are chloro. 3-Isochromanone is useful, inter alia , as an intermediate in the manufacture of agricultural products, especially fungicides of the strobilurin type.
    • 描述了用于制备具有通式(I)的3-异色满酮的方法:该方法包括使邻甲酰基乙酸与合适的卤化剂反应以形成通式(III)的化合物:其中R是卤素,使 通式(III)的化合物与合适的卤化剂反应以形成通式(II)的化合物:其中X为卤素; 和(a)用碱水溶液处理通式(II)的化合物至pH7至14,然后酸化; 或(b)将通式(II)的化合物加入到水中同时加入碱以保持pH在5和8之间; 或(c)用水或含水酸处理通式(II)的化合物,然后pH调节至5至8之间的pH值。通常R和X均为氯。 3-异色满酮尤其可用作制造农产品,特别是嗜球果伞素类杀真菌剂的中间体。