(Z)-3-Amino-2-cyano-3-diethylamino-thioacrylamide 、 双氧水 以to give 41.5 g of white 5-amino-4-cyano-3-(diethylamino)isothiazole, m.p. 87°-88°的产率得到5-amino-3-diethylamino-isothiazole-4-carbonitrile
A new class of herbicidal compounds consisting of 1-alkyl- and 1,1-dialkyl-3-(4-substituted-3-amino-5-isothiazolyl)ureas and N-(4-substituted-3-amino-5-isothiazolyl)-alkanamides, in which the 4-substituent consists of cyano and carbamoyl, exhibits preemergence and postemergence herbicidal activity, controlling effectively the growth of a wide spectrum of grassy and broad-leaved plant species. The synthesis of members of this class is described in detail, and the utility of representative compounds is exemplified.