Ketene s,s-acetal derivative, a process for manufacturing thereof and a

Abstract

A novel ketene S,S-acetal derivative which is useful as an antimycotic agent and an agricultural chemical of fungicidal, plant growth regulating or insecticidal properties represented by the general formula (I): ##STR1## wherein R represents a hydrogen atom; an alkyl group having 1 to 8 carbon atoms; a cycloalkyl group having 3 to 6 carbon atoms; a methylene group; a lower alkenyl group; a lower alkyl group substituted by a halogen atom, a cyano group, a lower alkoxy group, a lower alkylthio group; a carbamoyl group, an acyl group, or an alkenoyloxy group; a phenyl group represented by ##STR2## (in which R.sub.1 represents a hydrogen atom, a halogen atom, a straight or branched chain lower alkyl group, a lower alkoxyl group which may be substituted by one or more halogen atoms, a phenoxy group or a methylenedioxy group, and m represents an integer of 1 to 3); a benzyl group; a methylenedioxybenzyl group; a phenoxyalkyl group; a phenoxyalkyl group substituted by a halogen atom; a naphthyl group; or a substituted or unsubstituted pyridyl group.