申请人:Sumitomo Chemical Company, Limited
公开号:US04268301A1
公开(公告)日:1981-05-19
A process for producing novel 1,4-benzothiazine derivatives (I), ##STR1## (in which X is a halogen atom) and their derivatives, ##STR2## wherein R is a (C.sub.1 -C.sub.5) alkyl, (C.sub.3 -C.sub.6) cycloalkyl, phenyl, substituted phenyl, phenyl (C.sub.1 -C.sub.5) alkyl or phenoxy (C.sub.1 -C.sub.5) alkyl group, and herbicides containing these compounds as an active ingredient. Compound (I) is produced by the reaction between Compound (II) and phosphorus pentasulfide; Compound (II) is produced (1) by the reaction between an aminothiophenol (III), ##STR3## (in which X is a halogen atom), and a halogenated acetic acid, (2) by the ring closure of Compound (VI), (3) by the reduction and ring closure of Compound (VIII), and (4) by the hydrolysis and ring closure of Compound (X); Compound (VI) is produced by the reaction between Compound (III) and a halogenated acetyl halide; Compound (VIII) is produced by the oxidation of Compound (III) followed by reaction with a halogenated acetyl halide; and Compound (X) is produced by the reaction between Compound (III) and a halogenated acetic ester. Compounds (I), (II), (VI), (VIII) and (X) have a herbicidal activity.
一种生产新型1,4-苯并噻嗪衍生物(I)的方法,其中,##STR1##(其中X是卤素原子)及其衍生物,##STR2##其中R是(C.sub.1-C.sub.5)烷基,(C.sub.3-C.sub.6)环烷基,苯基,取代苯基,苯基(C.sub.1-C.sub.5)烷基或苯氧基(C.sub.1-C.sub.5)烷基,以及含有这些化合物作为活性成分的除草剂。化合物(I)由化合物(II)和五硫化二磷的反应产生;化合物(II)由以下反应产生:(1)氨基硫酚(III)和卤代乙酸的反应,##STR3##(其中X是卤素原子),(2)化合物(VI)的环合成,(3)化合物(VIII)的还原和环合成,以及(4)化合物(X)的水解和环合成;化合物(VI)由化合物(III)和卤代乙酰卤的反应产生;化合物(VIII)由化合物(III)的氧化后与卤代乙酰卤的反应产生;化合物(X)由化合物(III)和卤代乙酸酯的反应产生。化合物(I)、(II)、(VI)、(VIII)和(X)具有除草活性。