Salicylaldehyde derivatives and salicylic acid derivatives and their sulfur analogs, their preparation and their use as herbicides and bioregulators

Abstract From the Canadian patent

Salicylaldehyde derivatives and salicylic acid derivatives of the formula I, (see formula I), where A is an unsubstituted or substituted phenyl radical an unsub-, stituted or substituted 5-membered heteroaromatic radical having from 2 to 4 nitrogen atoms or two nitrogen atoms and additionally one sulfur or oxygen atom or an unsubstituted or substituted thienyl pyridyl, naphthyl, quinolyl, indazolyl or benzotriazolyl radical X is oxygen or sulfur, and, the radicals R1 to R4 have the meanings given in the specification processes and intermediates for their production and their use as, herbicides and bioregulators.