New triazolo-(4,3-a)pyridine(s) and N'-(2-pyridyl)-hydrazone(s)

摘要

Substd. 1,2,4-triazolo-(4,3-a)pyridines of formula (I) and substd. N'-(2-pyridyl)hydrazones of formula (II) for use in herbicidal compositions are new, where A = 5-membered heterocycle (comprising 1-3 of N, O or S; ring C's opt. substd. with halo, 1-4C alkyl or halo (1-4C)alkyl and 1 ring N is opt. substd. with 1-4C alkyl), 1-10C alkyl (opt. substd. with B), 2-10C alkenyl (opt. substd. with B, or 2-10C alkynyl (opt. substd. with B); B = halo, Cn, 3-6C cycloalkyl, halo-(3-6C)cycloalkyl, cyano-(3-6C)cycloalkyl, 1-4C alkyl-3-6C cycloalkyl, halo(1-4C)alkyl-(3-6C) cycloalkenyl, halo(1-4C)alkyl (3-6C)cycloalkenyl, cyano (1-4C)alkyl (3-6C)cycloalkenyl (i), 3-8C cycloalkyl (ii) or 3-8C cycloalkenyl; (iii); (i), (ii) and (iii) are opt. substd. with halo, CN, 1-4C alkyl, halo(1-4C)alkyl, cyano (1-4C)alkyl, 2-4C alkenyl, halo(2-4C)alkenyl, cyano(2-4C)alkenyl, 2-4C alkynyl, halo(2-4C)alkynyl, cyano(2-4C)alkynyl (iv), Ph(v) or benzyl (vi); R1 = halo, Oh, 1-6C alkyl, halo (1-6C)alkyl, 1-6C alkoxy, halo (1-6C)alkoxy, 1-6C alkylthio, halo(1-6C)alkylthio, 1-6C alkylsulphinyl, 1-6C alkylsulphonyl, 1-6C alkoxy; carbonyl, phenyl (1-6C) alkoxycarbonyl, Ph, phenoxy.