[EN] PROCESS FOR THE PREPARATION OF OPTICALLY ACTIVE ISOXAZOLINE COMPOUNDS<br/>[FR] PROCÉDÉ DE PRÉPARATION DE COMPOSÉS ISOXAZOLINE OPTIQUEMENT ACTIFS
申请人:SYNGENTA PARTICIPATIONS AG
公开号:WO2016023787A1
公开(公告)日:2016-02-18
The present invention relates to a process for the preparation of a compound of formula (I) wherein A1 and A2 are C-H, or one of A1 and A2 is C-H and the other is N; R1 is C1-C4alkyl, C1-C4haloalkyl or C3-C6cycloalkyl; each R2 is independently bromo, chloro, fluoro or trifluoromethyl; R3 is hydrogen; R4 is hydrogen, halogen, methyl, halomethyl or cyano; or R3 and R4 together form a bridging 1,3-butadiene group; R5 is chlorodifluoromethyl or trifluoromethyl; n is 2 or 3; by reacting a compound of formula (II) wherein A1, A2, R1, R2, R3, R4, R5 and n is as defined under formula (I) above, with hydroxylamine, a base and a chiral catalyst, characterized in that the chiral catalyst is a dimeric chiral catalyst of formula (III) wherein R6, R7, R8, R9, R10 and X are as defined in claim 1.
本发明涉及一种制备式(I)化合物的方法,其中A1和A2是C-H,或者A1和A2中的一个是C-H,另一个是N;R1是C1-C4烷基,C1-C4卤代烷基或C3-C6环烷基;每个R2独立地是溴、氯、氟或三氟甲基;R3是氢;R4是氢、卤素、甲基、卤代甲基或氰基;或者R3和R4一起形成桥接的1,3-丁二烯基团;R5是氯二氟甲基或三氟甲基;n为2或3;通过将式(II)化合物与羟胺、碱和手性催化剂反应,其中A1、A2、R1、R2、R3、R4、R5和n如上述式(I)所定义,其特征在于手性催化剂是式(III)的二聚手性催化剂,其中R6、R7、R8、R9、R10和X如权利要求1所定义。