N-sulfonyl-alpha-amino-acid derivatives

摘要

The invention relates to N-sulfonyl-alpha-amino-acetic acid derivatives of the general formula (I): including the optical isomers thereof and mixtures of such isomers, wherein Ar₁ and Ar₂ independently of each other stand for an optionally substituted aryl or heteroaryl group, R₁ and R₂ stand independently of each other for hydrogen, optionally substituted C₁-C₅alkyl, optionally substituted C₂-C₅alkenyl, C-₂C₅alkynyl or optionally substituted C₃C₆Cycloalkyl; R₃ designates hydrogen, C-₃C₅alkenyl, C₃-C₅ alkynyl or optionally substituted C₁-C₅alkyl; R₄ is optionally substituted C₁-C₅alkyl, optionally substituted C-₂C₅alkenyl, C-₂C₅aklynyl or optionally substituted C-₃C₆ cycloalkyl; R₅ and R₆ are independently of each other hydrogen or optionally substituted C₁-C₅alkyl, optionally substituted C₂-C₅alkenyl, C-₂C₅alkynyl or optionally substituted C₃-C₆cycloalkyl; R₇ and R₈ are independently of each other hydrogen or optionally substituted C₁-C₅alkyl, optionally substituted C₂-C₅alkenyl, C₂-C₅alkynyl or optionally substituted C₃-C₆cycloalkyl; W designates a bridge selected from -O-, -S-, -SO-, -SO₂- or is an -NH- or -N(C₁-C₅alkyl)-bridge; X designates a direct bond or a bridge selected from -O-, -S-, -SO-, -SO₂- or is an -NH or -N(C₁C₅alkyl)-bridge; Y designates -OR₉ or NR₁₀R₁₁; a and b independently of each other stand for a number 1, 2 or 3; and c stands for a number zero, 1 or 2; with R₉,R₁₀ and R₁₁ being defined according to the claims. These compounds possess useful plant protecting properties and may advantageously be employed in agricultural practice for controlling or preventing the infestation of plants by phytopathogenic microorganisms, especially fungi.