Patent ID: 6265590
Filing Date: 2001-07-24
Classification: C07C

Abstract:
N.sub..alpha. -2-(4-nitrophenylsulfonyl)ethoxycarbonyl-amino acids having the general formula: ##STR5##wherein R.sub.1 represents a hydrogen atom, and R.sub.2 may represent hydroxymethyl, 1-hydroxyethyl, 4-hydroxybenzyl, imidazolyl-2-methyl, benzyloxymethyl, 1-benzyloxyethyl, 4-benzyloxybenzyl, benzyloxycarbonylmethyl, 2-(benzyloxycarbonyl)ethyl, S-benzylthiomethyl, S-(diphenylmethyl)thiomethyl, 4-(benzyloxycarbamido)butyl, 3-guanidinopropyl, 3-(N.sup.G -toluenesulfonyl)guanidinopropyl, 3-(N.sup.G -nitro)guanidinopropyl, 3{N.sup.G (4-methoxy-2,3,6-trimethylbenzenesulfonyl)}-guanidinopropyl, N-(4,4'-dimethoxybenzhydryl)carboxamidomethyl, 2-{N-(4,4'-dimethoxybenzhydryl)carboxamido}ethyl, S-tert-butyldithiomethyl, 4-{2-(4-nitrophenylsulfonyl)ethoxycarbamido}-butyl, propyl, butyl, or ethyl.