Sodium Carbonate → 3-{3-[3-(2,2,2-Trifluoro-ethyl)-ureido]-phenyl}-imidazo[1,2-a]pyridine-7-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

To a solution of 3-Iodo-imidazo[1,2-a]pyridine-7-carboxylic acid methyl ester (3.02 g, 10 mmol) in DME (200 ml) was added 1-[3-(4,4,5,5-Tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-3-(2,2,2-trifluoro-ethyl)-urea (4.13 g, 12 mmol), 1M Na2CO3 (80 ml) [reaction degassed by bubbling N2 through] followed by tetrakis(triphenylphosphine)palladium(0) (0.58 g, 0.5 mmol). The mixture was heated at 80° C. overnight, then diluted with water and extracted with CH2Cl2. The aqueous layer was neutralised and loaded onto a reverse phase (C18) SPE (Solid Phase Extraction) cartridge. The cartridge was washed with H2O (2 column volumes) and eluted with MeOH (2 column volumes), the organic solvent removed in vacuo to afford the product as an off-white solid: 1H NMR (400 MHz, DMSO-d6): 12.31 (1H, s), 9.77 (1H, s), 8.85 (1H, d), 8.12 (1H, d), 8.04 (1H, s), 7.94 (1H, s), 7.84 (1H, s), 7.76 (1H, d), 7.39 (1H, t), 7.21 (1H, d), 4.05-3.90 (2H, m). MS: [M+H]+ 379.

Provenance & Evidence