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。