3-Amino-4-(1H-indol-3-yl)butanoic acid--hydrogen chloride (1/1) → (S)-N-(3,4,5-Trimethoxybenzyl)-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-(3,4,5-trimethoxybenzyl)-N-methyl-2-[N'-(t-butoxycarbonyl)-2-oxo-ethylamino]-3-phenyl-propionamide (0.25 g, 1.0 mmol) and (S)-2-(1H-indol-3-yl)-1-carboxymethyl-ethylamine hydrochloride salt ((S)-tryptophan methyl ester hydrochloride salt) (0.41 g, 1.0 mmol). Purify by chromatography eluting sequentially with 1% methanol/dichloromethane and 5% methanol/dichloromethane to give the title compound: TLC Rf =0.83 (silica gel, 10% methanol/dichloromethane).

Provenance & Evidence