申请人:Sumitomo Chemical Company, Limited
公开号:US04337357A1
公开(公告)日:1982-06-29
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-苯并噻唑衍生物(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,以及包含这些化合物作为活性成分的除草剂。化合物(I)通过化合物(II)与五硫化二磷的反应制备;化合物(II)通过以下方法制备:(1)氨基硫酚(III)##STR3##(其中X是卤素原子)与卤代乙酸的反应,(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)通过化合物(III)与卤代乙酰卤的反应制备;化合物(VIII)通过化合物(III)的氧化后与卤代乙酰卤反应制备;化合物(X)通过化合物(III)与卤代乙酸酯的反应制备。化合物(I)、(II)、(VI)、(VIII)和(X)具有除草活性。