5-Cyano-thiazol-2-yl oxy:acetic acid amide derivs. - selective herbicides for use in cotton, soya, beet and cereal crops

摘要

Substd. 5-cyano thiazol-2-yl- oxyacetic acid amide derivs. of formula (I) are new. In the formula, R is Cl or Me, R1 is opt. halo substd. 1-5C alkyl, 3-5C alkenyl, 3-5C alkinyl, cyano-(1-4C)-alkyl, 1-4C alkoxy-(1-4C)-alkyl 3-5C cycloalkyl or phenyl-(1-2C)-alkyl; R2 is opt. halo substd. 1-5C alkyl, 3-5C alkenyl, 3-5C alkinyl, cyano-(1-4C)-alkyl, 1-4C alkoxy-(1-4C)-alkyl, 3-6C cycloalkyl, phenyl-(1-2C)-alkyl, phenyl, or is Ph opt. substd. by Me, F, Cl, Br, CF3, MeO and/or NO2; or R1 and R2 together with the N atom to which they are attached form pyrrolidyl, piperidyl, morpholinyl, perhydroazepinyl, indolinyl, perhydroindolyl, 1,2,3,4-tetrahydroquinolyl, 1,2,3,4-tetrahydroisoquinolyl, perhydroquinolyl or perhydroisoquinolyl (all these gps. being opt. substd. with Me, MeO, EtO, and/or Et) or form gps. of formula (A) or (B). The intermediate substd. 2-chloro-5-cyano- thiazole derivs. of formula (II) are also new. (I) are insecticides effective against both mono- and dicotyledons. (I) have good selectivity and can be used esp. in cotton, soya bean, beet and cereal (e.g. wheat and rice) crops. (II) are intermediates in the prepn. of (I).