Herbicidal allophanimidic acid esters of the formula: ##STR1## where R.sub.1, R.sub.2, R.sub.4 and R.sub.5 are selected from hydrogen and certain organic radicals, at least one of them being an organic radical; R.sub.3 is selected from hydrogen and certain organic radicals; R.sub.6 is selected from certain organic radicals; and X.sub.1, x.sub.2, and X.sub.3 are selected from oxygen and sulfur; And salts of the above compounds in which R.sub.3 is hydrogen. Preparation of the compounds by carbamoylation of ##STR2## or by reaction of ammonia or an amine with ##STR3## where Y is --SCH.sub.3, --Cl, or ##STR4## An exemplary compound: methyl N-dimethylcarbamoyl-4-tert-butylthioallophanimidate.
配方为##STR1##的除草异热酰
脲酸酯,其中R.sub.1、R.sub.2、R.sub.4和R.sub.5选自氢和某些有机基团,其中至少一个为有机基团;R.sub.3选自氢和某些有机基团;R.sub.6选自某些有机基团;X.sub.1、x.sub.2和X.sub.3选自氧和
硫;以及上述化合物的盐,在其中R.sub.3为氢。通过对##STR2##进行
氨基甲酰化或通过
氨或胺与##STR3##反应来制备这些化合物,其中Y为--SCH.sub.3、--Cl或##STR4## 一个示例化合物:甲基N-二甲基
氨基甲酰-4-叔丁基
硫异热酰
脲酸酯。