Cesium carbonate → HCID 70982207, compound

Participants

Reaction Conditions

Reaction Steps

Into a solution of benzyl 2-bromo-1-methyl-1H-imidazole-4-carboxylate (2.8 g, 9.49 mmol) in THF (40 ml) and water (20 ml), cesium carbonate (7.71 g, 23.7 mmol) and cyclopropyl boronic acid (1.22 g, 14.2 mmol) were added under argon atmosphere at RT. The resulting mixture was degassed and purged with argon for 10 min. Pd(PPh3)2Cl2 (0.332 g, 0.04 mmol) was added to the mixture and heated at 100° C. for 12 h. The reaction mixture was filtered through a celite bed and the filtrate was diluted with water and extracted with EtOAc. The organic layer was concentrated and purified by flash chromatography. Yield 1.1 g. 1H-NMR (400 MHz; CDCl3): δ 0.95-1.02 (m, 2H), 1.07-1.11 (m, 2H), 1.72-1.78 (m, 1H), 3.70 (s, 3H), 5.32 (s, 2H), 7.29 (s, 1H), 7.42-7.62 (m, 5H), LC-MS: [M+1]=257.

Provenance & Evidence