(6-Methoxypyridin-3-yl)boronic acid → HCID 49835667, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of [4-(8-bromo-3-methyl-2-oxo-2,3-dihydro-imidazo[4,5-c]quinolin-1-yl)-3-methyl-pyrazol-1-yl]-acetic acid (Stage 101.1.1b, 161 mg, 0.387 mmol), 2-methoxypyridine-5-boronic acid (Aldrich, Buchs, Switzerland, 77 mg, 0.503 mmol), and PdCl2(PPh3)2 (17 mg, 0.024 mmol) in DMF (4.0 ml) and 1 M aqueous K2CO3 (1.16 ml) was stirred under argon at 105° C. for 1.25 h. The RM was cooled to rt. The mixture was diluted with MeOH+3 drops TFA and purified directly by Prep.HPLC (H2O (0.1% TFA)/CH3CN 95:5 to 65:35). The fractions containing products were collected together concentrated, before being lyophilized to give the title compound as a TFA-salt and white powder. (HPLC: tR 2.38 min (Method A); M+H=446 MS-ES; 1H-NMR (d6-DMSO, 400 MHz) 9.22 (s, 1H), 8.46 (s, 1H), 8.23-8.14 (m, 3H), 7.87-7.79 (m, 1H), 7.74-7.68 (m, 1H), 6.94-6.88 (m, 1H), 5.15-4.98 (m, 2H), 3.89 (s, 3H), 3.60 (s, 3H), 1.97 (s, 3H))

Provenance & Evidence