Improved method for the preparation of 4-methylsulfonyl benzoic acid derivatives and intermediates
申请人:ZENECA LIMITED
公开号:EP0478390A1
公开(公告)日:1992-04-01
This invention relates to an improved process for preparing an herbicidal intermediate compound having the structural formula:-
wherein groups X are independently selected from alkyl, haloalkyl, CN, halo, alkoxy, nitro, or S(O)mR² where R² is alkyl and m is 0, 1 or 2, n is 0 or an integer of from 1 to 4 and R⁵ is hydrogen or C₁₋₆ alkyl and intermediate compounds.
本发明涉及一种改进的除草剂中间体化合物的制备工艺,其结构式为
其中基团X独立地选自烷基、卤代烷基、CN、卤代、烷氧基、硝基或S(O)mR²,其中R²是烷基,m是0、1或2,n是0或1至4的整数,R⁵是氢或C₁₋₆烷基和中间体化合物。