Chemical compounds

Abstract

A fungicidal compound of formula (I): where Het is a 5- or 6-membered heterocyclic ring containing one to three heteroatoms, each independently selected from oxygen, nitrogen and sulphur, the ring being substituted by groups R, Rand R; Ris hydrogen, optionally substituted (Calkyl, optionally substituted (CalkylC(═O), optionally substituted (CalkylC(═O)O, optionally substituted (C)alkoxy(C)alkyl, optionally substituted allyl, optionally substituted propargyl or optionally substituted allenyl; R, R, Rand Rare each, independently, hydrogen, halogen, optionally substituted (C)alkyl, optionally substituted (C)alkoxy or optionally substituted (C)alkoxy(Calkyl; Ris an organic group containing three to thirteen carbon atoms and at least one silicon atom and, optionally, one to three heteroatoms, each independently selected from oxygen, nitrogen and sulphur, and is optionally substituted by one to four independently selected halogen atoms; R, Rand Rare each, independently, hydrogen, halogen, Calkyl, Chaloalkyl, Calkoxy(C)alkyl or cyano, where at least one of R, Rand Ris not hydrogen; and X is O or S; or an N-oxide thereof; and when present, each optional substituent on alkyl moieties, allyl, propargyl and allenyl is, independently, selected from halogen, hydroxy, cyano, methoxycarbonyl, ethoxycarbonyl, methoxy, ethoxy, methylsulfonyl, ethylsulfonyl, difluoromethoxy, trifluoromethoxy and trifluorothiomethoxy.