FUNGICIDES COMPRISING SQUARE BRACKETS OPEN 2-CYANO-2-(PHENYL OR NAPHTHYL)-2-(SUBSTITUTED)-ETHYL SQUARE BRACKETS CLOSED -PYRAZINES, PYRIMIDINES AND PYRIDAZINES

摘要

2-cyano-2-(phenyl or naphthyl)-2-substituted-ethyl heterocycles of the formula: CHEM wherein Het is a heterocyclic group selected from pyrimidinyl, pyrazinyl and pyridazinyl; R is hydrogen, alkyl, cycloalkyl, cycloalkylalkyl, haloalkyl, alkenyl, haloalkenyl, alkynyl, alkoxy, alkenoxy, alkynoxy, optionally substituted phenyl, optionally substituted naphthyl, optionally substituted phenylalkyl and optionally substituted phenoxyalkyl; and Ar is an optionally substituted phenyl or naphthyl group, are new compounds which are fungicidally active, particularly against phytopathogenic fungi.