1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 3-(S)-[(5-Chloro-1H-pyrrolo[2,3-c]pyridine-2-carbonyl)amino]-2-(S)-hydroxy-4-phenylbutyric acid methyl ester

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5-Chloro-1H-pyrrolo[2,3-c]pyridine-2-carboxylic acid (Preparation 18, 170 mg, 0.86 mmol) and (3S,2S)-3-amino-2-hydroxy-4-phenylbutyric acid methyl ester (Preparation 21A, 174 mg, 0.83 mmol) were coupled under similar conditions to EXAMPLE 43 using HOBt (142 mg, 0.93 mmol), EDCI (200 mg, 1.04 mmol), DIPEA (0.32 ml, 1.87 mmol) in DMF (10 ml). The crude product was purified by chromatography on silica gel eluting with hexane/ethyl acetate (25:75) to give the title compound as a colourless oil. δH (CDCl3): 3.04 (4H, 2dd), 3.74 (3H, s), 4.36 (1H, br s), 4.63 (1H, m), 4.98 (1H, ddd), 6.66 (1H, s), 6.96 (1H, d), 7.18–7.35 (5H, m), 7.48 (1H, s), 8.63 (1H, s).

Provenance & Evidence