Triethylamine → HCID 10389390, compound

Participants

Reaction Steps

To a solution of 2-(2,4-difluorobenzyl)-7-fluoro-3-(4-hydroxyphenyl)-2H-isoquinolin-1-one (54 mg, 0.14 mmol), a compound of formula (Id), in CH2Cl2 (8 mL) was added phenylboronic acid (35 mg, 0.28 mmol), copper (II) acetate (51 mg, 0.28 mmol), and powdered activated 4 Å molecular sieves (500 mg). The mixture was stirred for 10 minutes then treated with triethylamine (99 μL, 0.71 mmol). The resulting suspension was stirred for 72 hours at ambient temperature. The mixture was then filtered, and the filtrate was concentrated under reduced pressure. The crude product was purified by preparative thin-layer chromatography on silica gel eluting with 25% EtOAc/hexanes to afford 2-(2,4-difluorobenzyl)-7-fluoro-3-(4-phenoxyphenyl)-2H-isoquinolin-1-one, a compound of formula (Id), (29 mg, 45% yield) as a white solid. 1H-NMR (400 MHz, CDCl3): δ 8.11 (1H, dd, J=9.4, 2.8 Hz), 7.52 (1H, dd, J=8.6, 5.1 Hz), 7.45-7.36 (3H, m), 7.19-7.14 (1H, m), 7.14-7.09 (2H, m), 7.08-7.03 (2H, m), 7.02-6.93 (3H, m), 6.78-6.72 (1H, m), 6.70-6.64 (1H, m), 6.47 (1H, s), 5.24 (2H, s) ppm.

Provenance & Evidence