申请人:TAKEDA CHEMICAL INDUSTRIES, LTD.
公开号:EP1234819A1
公开(公告)日:2002-08-28
A process as represented by reaction scheme:
which permits industrial mass production of Δ2-1,2,4-oxadiazoline derivatives having excellent insecticidal effects or salts thereof in high yield with advantage, [wherein X1 is halogeno; R1 is optionally substituted alkyl, optionally substituted acyl, or ClCO; R2 is (1) halogeno, (2) C1-6 haloalkyl, (3) C1-6 haloalkoxy, or (4) phenyl optionally substituted with C1-6 haloalkyl; A is nitrogen or =CR3- (wherein R3 is Cl or CN) ; R4 is C1-6 alkyl or C1-6 haloalkyl; n is 0, 1 or 2; and X2 is halogeno].
一种由反应方案表示的工艺:
其中 X1 为卤代;R1 为任选取代的烷基、任选取代的酰基或 ClCO;R2 是(1)卤素,(2)C1-6 卤代烷基,(3)C1-6 卤代烷氧基,或(4)任选被 C1-6 卤代烷基取代的苯基;A 是氮或 =CR3-(其中 R3 是 Cl 或 CN);R4 是 C1-6 烷基或 C1-6 卤代烷基;n 是 0、1 或 2;以及 X2 是卤素]。