Benzylamine → 5-[(2S)-3-(Benzylamino)-2-({(2S)-2-[(tert-butoxycarbonyl)amino]-3-phenyl-propa-noyl}amino)-3-oxopropyl]-2-(carboxymethoxy)benzoic Acid

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Reaction Steps

Synthesis was performed from (2S)-2-({(2S)-2-[(tert-butoxycarbonyl)amino]-3-phenylpropanoyl}amino)-3-[3-(methoxycarbonyl)-4-(2-methoxy-2-oxoethoxy)phenyl]propanoic acid and benzylamine (31 μL) according to Method A to give a material which was re-purified by reversed phase C-18 HPLC in absence of trifluoroacetic acid to give the title compound (29 mg). 1H-NMR (400 MHz, CD3OD) d 7.78 (s, 1H), 7.36 (dd, J=2.0 Hz, J=8.6 Hz, 1H), 7.30-7.13 (m, 10H), 6.96 (d, J=8.5 Hz, 1H), 4.79 (s, 2H), 4.58 (t, J=6.9 Hz, 1H), 3.11-2.94 (m, 4H), 2.76 (dd, J=10 Hz, J=13.4 Hz, 1H), 1.33 (s, 9H); IR (KBr) 3304, 2979, 1694, 1640 cm−1; HRMS m/z 619.2511 (calc. of monoisotopic mass for C33H37N3O9 gives 619.2530).

Provenance & Evidence