Triethylamine → 3-(1-Carboxycyclopentyl)-2-aminopropanoic acid t-butyl ester

Participants

Reaction Steps

3-(1-Carboxycyclopentyl)-2-(dibenzylaminomethyl)propanoic acid t-butyl ester hydrochloride (20.0 g; 41 mmol) in ethanol (160 ml) and triethylamine (2.0 ml) was hydrogenated over palladium (from 20% Pd(OH)2 /C; 20 g) at 60 p.s.i. (4.1 bar). After eighteen hours the mixture was filtered through arbicel, the solvent evaporated and the residue dried azeotropically with toluene. The required primary amino acid triethylamine salt, containing one mole equivalent of triethylamine hydrochloride was thus obtained as a white solid (16.21 g).

Provenance & Evidence