Acetic Acid → 3-{[7-(2-Chloro-4-fluoro-phenoxy)-1-cyano-4-hydroxy-isoquinoline-3-carbonyl]-amino}-2,2-dimethyl-propionic acid

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Reaction Steps

A mixture of A mixture of 1-cyano-4-hydroxy-7-(4-fluoro-2-chloro-phenoxy)-isoquinoline-3-carboxylic acid ethyl ester (40 mg, 0.10 mmol) and 3-amino-2,2-dimethyl-propionic acid tert-butyl ester (43 mg, 0.25 mmol) in 1 mL of MeOH was microwaved at 130° C. for 1 h. Reaction mixture was quenched with acetic acid (0.3 mmol) and then concentrated. Residue was purified by silica gel chromatography, eluting with 5-60% EtOAc/hexanes, to provide the title compound 41 mg (0.08 mmol) in 80% yield. 1H NMR (200 MHz) in CDCl3, δ ppm: 14.07 (s, 1H), 8.41 (d, J=9.2 Hz, 1H), 8.32 (br t, 1H), 7.50 (dd J=9.1, 2.6 Hz, 1H), 7.38-7.10 (m, 4H), 3.55 (d, J=6.8, 2 H), 1.23 (s, 6H).

Provenance & Evidence