3-Amino-4-(1H-indol-3-yl)butanoic acid--hydrogen chloride (1/1) → (S)-N-(2-Methoxybenzyl)-N-methyl-2-[[(S)-2-(1H-indol-3-yl)-1-carboxymethyl-ethylamino]-N'-(t-butoxycarbonyl)-ethylamino]-3-phenyl-propionamide

Participants

Reaction Steps

Prepare by the method of Example 1 using (S)-N-(2-methoxybenzyl)-N-methyl-2-[N'-(t-butoxycarbonyl)-2-oxo-ethylamino]-3-phenyl-propionamide (0.71 g, 1.6 mmol) and (S)-2-(1H-indol-3-yl)-1-carboxymethyl-ethylamine hydrochloride salt ((S)-tryptophan methyl ester hydrochloride salt) (0.45 g, 1.76 mmol). Purify by chromatography eluting with 50% ethyl acetate/hexane to give the title compound: TLC Rf =0.56 (silica gel, 50% ethyl acetate/hexane)

Provenance & Evidence