| abstract |
PURPOSE: To obtain a novel amino acid amide deriv. that is effective as a removing agent for harmful pests, especially as a bactericide and fungicide for protection of plants. n CONSTITUTION: This compd. is expressed by formula I, wherein R 1 , R 2 and R 4 to R 6 are H or an alkyl, R 3 is a cycloalkyl, each of Ar and Ar' is an aryl, aralkyl, heteroaryl or heteroarylalkyl. For example, the compd. is N 2 - phenoxycarbonyl-N' [rac.-1-(4-chlorophenyl)ethyl]-L-cyclopentyl glycine. The compd. is obtd. by the reaction of a substd. amino acid expressed by formula II with an amine expressed by HNR 1 -CR 5 R 6 Ar' in the presence of a catalyst (such as 4-dimethyl aminopyridine) and an acid binder (such as triethylamine) in a solvent such as methylene chloride at a temp. of -78 to 120°C. The obtd. compd. is especially suitable to protect tomatoes from phytophthoro. n COPYRIGHT: (C)1992,JPO |