FURYL COMPOUNDS THEIR USE AS FUNGICIDES AND THEIR PREPARATION

摘要

The present invention provides in one aspect a method of combating a fungus at a locus, characterised by treating the locus with a fungicidally effective amount of a compound of general formula I wherein each of R<1> and R<2> independently represents a hydrogen atom or an optionally substituted alkyl, alkenyl, alkynyl, aryl or aralkyl group; or an optionally substituted cycloalkyl, bicycloalkyl, cycloalkenyl or bicycloalkenyl group containing up to 12 ring atoms, in which at least one methylene group is optionally replaced by an oxygen atom or by a sulphone or sulphoxide group; or a group of general formula -(CH2-O)m- @-(O)p-R<5> in which m is 0 and p is 0 or 1, or m is 1 and p is 0, and R<5> is an optionally substituted alkyl, alkenyl, aryl or aralkyl group; or R<1> and R<2> together with the interjacent carbon atoms form an optionally substituted cycloalkylene, bicycloalkylene, tricycloalkylene, cycloalkenylene, bicycloalkenylene or tricycloalkenylene group containing up to 18 ring atoms, in which at least one methylene group is optionally replaced by an oxygen or sulphur atom or by a sulphone or sulphoxide group; or an optionally substituted dihydronaphthylene, tetrahydronaphthylene, dihydrophenanthrylene or dihydroacenaphthylene group; each of R<3> and R<4> independently represents a hydrogen atom or an alkyl group or together represent a single chemical bond; or R<1> and R<3> together with the interadjacent carbon atom form an optionally substituted cycloalkyl, bicycloalkyl, cycloalkenyl or bicycloalkenyl group containing up to 12 ring atoms, in which at least one methylene group is optionally replaced by an oxygen atom or a sulphone or sulphoxide group; provided that when R<3> and R<4> do not together represent a single chemical bond, at least one of R<1>, R<2>, R<3> and R<4> is a hydrogen atom. Also certain of such compounds per se, and their preparation.