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.
草酸性异相聚酰胺酸酯的
化学式为:##STR1## 其中R.sub.1、R.sub.2、R.sub.4和R.sub.5可选自氢和某些有机基团,其中至少一个是有机基团;R.sub.3可选自氢和某些有机基团;R.sub.6可选自某些有机基团;X.sub.1、x.sub.2和X.sub.3可选自氧和
硫;以及上述化合物的盐,其中R.sub.3为氢。通过对##STR2##进行
氨基甲酰化反应或通过
氨或胺与##STR3##反应制备上述化合物,其中Y为--SCH.sub.3、--Cl或##STR4##一种典型的化合物为:甲基N-二甲基
氨基甲酰基-4-叔丁基
硫代异相聚酰胺酸酯。