(6-Methoxypyridin-3-yl)boronic acid → HCID 59620052, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 8-bromo-1-(1,3-dimethyl-1H-pyrazol-4-yl)-3-methyl-1,3-dihydro-imidazo[4,5-c]quinolin-2-one (Stage A.1, 49 mg, 0.137 mmol), 2-methoxypyridine-5-boronic acid (Sigma-Aldrich, Buchs, Switzerland, 26 mg, 0.170 mmol), and PdCl2(PPh3)2 (6 mg, 0.0085 mmol) in DMF (1.2 ml) and 1 M aqueous K2CO3 (0.343 ml) was stirred under argon at 105° C. for 1.5 h. The RM was cooled toll. The mixture was diluted with MeOH+3 drops TFA and purified directly by Prep.HPLC (H2O (0.1% TFA)/CH3CN 95:5 to 60:40). The fractions containing products were collected together and basified with NaHCO3 (0.3 g), before being concentrated. The resulting suspension was filtered and the cake was washed with water, before being dried under high vacuum to give the title compound as a white solid. (HPLC: tR 2.46 min (Method A); M+H=387 MS-ES; 1H-NMR (d6-DMSO, 400 MHz) 11.66 (s, br, 1H), 8.72 (s, 1H), 8.33-8.26 (m, 1H), 8.16-8.10 (m, 1H), 8.09-8.01 (m, 1H), 7.91-7.84 (m, 1H), 7.81-7.74 (m, 1H), 7.51-7.43 (m, 1H), 6.98-6.91 (m, 1H), 3.90 (s, 3H), 3.87 (s, 3H), 1.95 (s, 3H))

Provenance & Evidence