[EN] PROCESS FOR THE PREPARATION OF 6-(HALOALKYL)-2-HALO-5-ACYLPYRIDINES AND INTERMEDIATES FOR THIS PROCESS<br/>[FR] PROCÉDÉ DE PRÉPARATION DE 6-(HALOALKYL)-2-HALO-5-ACYLPYRIDINES ET D'INTERMÉDIAIRES POUR CE PROCÉDÉ
申请人:BAYER AG
公开号:WO2020025574A1
公开(公告)日:2020-02-06
The present invention relates to a process for preparing compounds of formula (I) (I), wherein R represents C1-C2-alkyl or C1-C2-haloalkyl, R1 represents C1-C6-alkyl, C2-C6-alkenyl, C2-C6- alkynyl, C3-C8-cycloalkyl, C3-C8-cycloalkyl-C1-C4-alkyl, phenyl, phenyl-C1-C4-alkyl, phenyl-C2-C4- alkenyl or phenyl-C2-C4-alkynyl, and X represents chlorine or bromine, by reacting a compound of formula (II) (II), wherein RA represents -CN or –COOH and R is defined as in formula (I), in a first step A) with a dehydroxyhalogenation agent selected from COCl2, diphosgene, triphosgene, cyanuric chloride, SOCl2, SO2Cl2, PCl3, PCl5, POCl3, PBr3, SOBr2 and SO2Br2, to arrive at a compound of formula (III) (III), wherein RB represents -CN or –COX, and X and R are defined as in formula (I), and the compound of formula (III) is reacted in step B) with a compound of formula (IV) R1M1(lV), - 41 - wherein M1 represents Li or MgY, wherein Y represents chlorine or bromine, and R1 is defined as in formula (I), and optionally further reacting the compound of formula (I) to a triazole derivative of formula (VIII) (VIII). It further relates to a process for preparing the compound of formula (II) and to particular compounds of formula (II) and (III).
本发明涉及一种制备式(I)(I)化合物的过程,其中R代表C1-C2-烷基或C1-C2-卤代烷基,R1代表C1-C6-烷基,C2-C6-烯基,C2-C6-炔基,C3-C8-环烷基,C3-C8-环烷基-C1-C4-烷基,苯基,苯基-C1-C4-烷基,苯基-C2-C4-烯基或苯基-C2-C4-炔基,X代表氯或溴,通过将式(II)(II)化合物与脱羟卤代试剂A)反应,所述脱羟卤代试剂选自COCl2,二氯化二膦,三氯化三膦,三聚氰氯,SOCl2,SO2Cl2,PCl3,PCl5,POCl3,PBr3,SOBr2和SO2Br2,得到式(III)(III)化合物,其中RB代表-CN或-COX,X和R如式(I)所定义,然后在步骤B)中将式(III)化合物与式(IV) R1M1(lV)化合物反应,其中M1代表Li或MgY,Y代表氯或溴,R1如式(I)所定义,并且可以进一步将式(I)化合物反应为式(VIII)(VIII)的三唑衍生物。本发明还涉及制备式(II)化合物的过程以及特定的式(II)和式(III)化合物。