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    • 1. 发明申请
    • CHEMICAL PROCESS
    • 化学工艺
    • WO2005095358A2
    • 2005-10-13
    • PCT/GB2005/001188
    • 2005-03-29
    • ASTRAZENECA ABASTRAZENECA UK LIMITEDLARSSON, UlfRADEVIK, Kajsa
    • LARSSON, UlfRADEVIK, Kajsa
    • C07D239/46
    • C07D239/47
    • The present invention provides a process for the preparation of a compound of formula (I); wherein X is halogen; Y is ZR 1 ; Z is oxygen or sulphur; and R 1 is C 1-6 alkyl, C 1-6 haloalkyl or C 3-7 cloalkyl; the process comprising either: hydrogenating a compound of formula (II); with a suitable transition metal catalyst in a C 1-6 aliphatic alcohol, an ether, an hydrocarbon as solvent; or, b) conducting a one-pot hydrogenation of a compound of formula (III): wherein R 2 is phenyl optionally substituted by chloro,C 1-6 alkyl, C 1-6 alkoxy or (C 1-6 alkyl) 2 N; firstly at about 20 ° C to form a compound of formula (IV): and then at about 40 ° C; both steps (I) and (ii) being carried out in the presence of a suitable catalyst and in the presence of a suitable solvent.
    • 本发明提供制备式(I)化合物的方法; 其中X是卤素; Y为ZR <1>; Z是氧或硫; 且R 1为C 1-6烷基,C 1-6卤代烷基或C 3-7杂烷基; 该方法包括:将式(II)的化合物氢化; 在C 1-6脂族醇,醚,烃作溶剂中使用合适的过渡金属催化剂; 或者,b)进行式(III)化合物的一锅氢化:其中R 2是任选被氯,C 1-6烷基,C 1-6烷氧基或(C 1-6烷基)2 N取代的苯基; 首先在约20℃下形成式(IV)的化合物,然后在约40℃; 步骤(I)和(ii)都在合适的催化剂存在下和在合适的溶剂存在下进行。