申请人:Indiana University Foundation
公开号:US04254259A1
公开(公告)日:1981-03-03
By varying the acidity, solvent polarity, and temperature of the reaction of thiosemicarbazide with ethyl 4-chloroacetoacetate, ethyl 2-amino-6H-1,3,4-thiadiazine-5-acetate hydrochloride, ethyl 2-hydrazinothiazole-4-acetate, and ethyl 2-imino-3-aminothiazoline-4-acetate hydrochloride may be prepared selectively. Further derivatives may be prepared by benzoylation and nitrosation. These compounds have demonstrated utilities as herbicides.
通过改变
硫脲甲酸酯与乙基4-
氯乙酰乙酸酯反应的酸度、溶剂极性和温度,可以选择性地制备
乙酸乙酯羟
氯化物、
乙酸乙酯2-
氨基-6H-1,3,4-噻二嗪-5-
乙酸酯、
乙酸乙酯2-
肼噻唑-4-
乙酸酯和
乙酸乙酯2-亚
氨基-3-
氨基
噻唑-4-
乙酸酯羟
氯化物。通过苯甲酰化和亚硝化可以制备进一步的衍
生物。这些化合物已经被证明是
除草剂。