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

摘要

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.