Beta-Alanine → 3-[(1-Cyano-4-hydroxy-7 phenoxy-isoquinoline-3-carbonyl)-amino]-propionic acid

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Reaction Steps

A mixture of 1-cyano-4-hydroxy-7-phenoxy-isoquinoline-3-carboxylic acid methyl ester (88 mg, 0.27 mmol) and beta-alanine (122 mg, 1.38 mmol) in 2.2 ml of 0.5 M NaOMe/MeOH solution was microwaved at 120° C. for 10 min. Reaction mixture was concentrated. The residue was dissolved in water (80 ml) and extracted with EtOAc, which was discarded. The aqueous layer was acidified by 1 N HCl to pH=3-4 and extracted with EtOAc. Organic layer was dried over MgSO4, filtered and concentrated. The crude product was triturated with hot MeOH and then CH2Cl2. Solid was collected and dried to provide the title compound 24 mg (0.064 mmol) in 24% yield.

Provenance & Evidence