METHYL 2-(SUBSTITUTED METHYL)-a- OXOBENZENEACETATE INTERMEDIATES FORFUNGICIDES

摘要

Fungicidal compounds of the formula (I) :and stereoisomers thereof, wherein R¹ is optionally substituted aryl or optionally substituted heteroaryl; Y is oxygen, sulphur or NR⁴; R², R³ and R⁴, which may be the same or different, are hydrogen, C_1-4 alkyl or C₂. ₄alkenyl; X is halogen, C_1-4 alkyl, C_2-4 alkenyl, C_1-4alkoxy, nitro or cyano; and n is 0 or an integer of 1 to 4; provided that when Y is oxygen, n is 0 and R¹ is unsubstituted phenyl at least one of R² and R³ is other than hydrogen or methyl.