OXETANE DERIVATIVES, THEIR PREPARATION AND THEIR USE AS ANTI-FUNGAL OR FUNGICIDAL AGENTS

摘要

Compounds of formula (I): [in which: R<1> and R<2> are hydrogen or alkyl, or together are cycloalkyl; R<3> and R<4> are hydrogen, alkyl or phenyl, or together are cycloalkyl; or R<1> and R<3> together are cycloalkyl fused to the oxetane ring; Ar is phenyl optionally substituted by hydrogen, halogen, alkyl, alkoxy, halogenated alkyl or halogenated alkoxy; and R<8> and R<9> are hydrogen or alkyl] and salts thereof have valuable agricultural and pharmaceutical anti-fungal or fungicidal activity. They may be prepared by a variety of processes.