[EN] PREPARATION OF SULFONAMIDE HERBICIDE PROCESS INTERMEDIATES<br/>[FR] PRÉPARATION D'INTERMÉDIAIRES DE TRAITEMENT HERBICIDE À BASE DE SULFONAMIDE
申请人:DOW AGROSCIENCES LLC
公开号:WO2020139740A1
公开(公告)日:2020-07-02
Improved methods for preparing chemical precursors to sulfonyl chloride III, which are important intermediates in the preparation of pyroxsulam herbicide are provided. Specifically, these precursors are compounds of Formulas VII and/or VIII, and IX, wherein R is a C1-C6 alkyl, R1 is a C1-C6 alkyl, X is Cl or OH, Y is halogen, OH, or OR2, and R2 is a C1-C6 alkyl.
提供了制备磺酰氯III的化学前体的改进方法,这些前体是制备吡草胺除草剂的重要中间体。具体而言,这些前体是公式VII和/或VIII以及IX的化合物,其中R是C1-C6烷基,R1是C1-C6烷基,X是Cl或OH,Y是卤素,OH或OR2,R2是C1-C6烷基。