Process for the production of 1-lower alkoxy-1-lower alkyl-3-substituted phenylurea, and intermediate thereof and process for the production of the intermediate
申请人:MITSUI PETROCHEMICAL INDUSTRIES, LTD.
公开号:EP0434074A3
公开(公告)日:1991-12-11
A 1-lower alkoxy-1-lower alkyl-3-[4-(2-lower alkoxy-2,3-dihydro-7-benzopyranyloxy)phenyl]-urea is prepared by a process which comprises alkylating a novel 1-hydroxy-3-[4-(2-lower alkoxy-2,3-dihydro-7-benzopyranyloxy)phenyl]urea with a corresponding alkylating agent selected from the group consisting of a sulfuric acid ester and an alkyl halide in the presence of a basic compound. The 1-lower alkoxy-1-lower alkyl-3-[4-(2-lower alkoxy-2,3-dihydro-7-benzopyranyloxy)phenyl]urea has a herbicidal activity. New intermediates and processes for production thereof are also disclosed.
制备1-低烷氧基-1-低烷基-3-[4-(2-低烷氧基-2,3-二氢-7-苯并吡喃氧基)苯基]脲的方法包括在碱性化合物的存在下,用来自于硫酸酯和烷基卤代物组成的群体中的相应烷基化试剂烷基化新型1-羟基-3-[4-(2-低烷氧基-2,3-二氢-7-苯并吡喃氧基)苯基]脲。1-低烷氧基-1-低烷基-3-[4-(2-低烷氧基-2,3-二氢-7-苯并吡喃氧基)苯基]脲具有除草活性。还公开了新的中间体和制备方法。