The invention relates to ±-oxygenated or ±-thiolated carboxylic acid phenethylamide derivatives of the general formula I including the optical isomers thereof and mixtures of such isomers, wherein A stands for optionally substituted aryl or optionally substituted heteroaryl； X is oxygen or sulfur； Y is oxygen or sulfur； R 1 is hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl, haloalkyl, haloalkenyl, haloalkynyl or halocycloalkyl； R 2 is hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkyl-alkyl, alkoxy-alkyl, alkoxy-alkenyl, alkoxy-alkynyl, whereof all alkyl- alkenyl-, alkynyl-, or cycloalkyl-groups me be optionally substituted by halogen； or optionally substituted aryl-alkyl, optionally substituted aryl-alkenyl, optionally substituted aryl-alkynyl or optionally substituted aryloxy-alkyl； R 3 is hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkyl-alkyl, alkoxy-alkyl, alkoxy-alkenyl, alkoxy-alkynyl, whereof all alkyl- alkenyl-, alkynyl-, or cycloalkyl-groups me be optionally substituted by halogen； or is optionally substituted aryl-alkyl, optionally substituted aryl-alkenyl, optionally substituted aryl-alkynyl, optionally substituted aryloxy-alkyl, optionally substituted heteroaryl-alkyl, optionally substituted heteroaryl-alkenyl or optionally substituted heteroaryl-alkynyl； R 4 is alkyl, alkenyl, alkynyl, alkoxy-alkyl, alkoxy, alkenyloxy, alkynyloxy, alkylthio, alkanoyl, alkylamino, dialkylamino, alkoxycarbonyl, whereof all alkyl- alkenyl or alkynyl-groups me be optionally substituted by halogen； or is halogen, cyano, nitro, amino, formyl or carboxyl； R 5 is hydrogen, alkyl, alkenyl or alkynyl； n is an integer 0,1, 2, 3, or 4； B 1 represents a bridge member -(CR 10 R 11 ) q - or -(CHR 10 R 11 ) r -Z-(CR 12 R 13 ) s , wherein q is an integer 2, 3 or 4； r is an integer 0, 1, 2, 3； s is an integer 1, 2 or 3, provided that (r + s) is either 1, 2 or 3； Z is -O-, -S-, -SO- -SO 2 -, NR 6 -, -CO-, -OOC-, -COO-, -NR 6 -CO- or -CO-NR 6 - ； R 6 is hydrogen
