Herbicidal triazolyl ureas - prepd from a 3-amino 1,2,4-triazole and an alkyl isocyanate or carbamoyl halide
Реферат: Triazolylureas of formula (I) (where R = H or lower alkyl, R1 = lower alkyl, R" v H or lower alkyl) are herbicides. Specif. claimed (I) are those in which (R1 = C2H5, R = R" = H) and R1 = R" = CH3, R = H. (I) are prepd. by treating an aminotriazole (II) with an isocyanate R'NCO, or a carbamoyl halide R'R"NCOX. When a carbamoyl halide is used the reaction is effected in the presence of an acid acceptor such as a tertiary base or metal carbonate.
Herbicidal 3-amino-1,2,4-triazole prepn. - by heating 1,2,4-triazol-3-carbonylazide and hydrolysing the product
Номер патента: FR2275456A1. Автор: . Владелец: Aries Robert. Дата публикации: 1976-01-16.