Carbon tetrabromide → 3'-[7-([1,2,4]Triazol-1-ylmethyl)imidazo[1,2-a]pyrimidin-3-yl]biphenyl-2-carbonitrile

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To a solution of 3′-(7-hydroxymethylimidazo[1,2-a]pyrimidin-3-yl)-biphenyl-2-carbonitrile (0.1 g, 0.31 mmol) in dichloromethane (5 ml) was added carbon tetrabromide (153 mg, 0.46 mmol) and triphenylphosphine (121 mg, 0.46 mmol). This mixture was stirred at ambient temperature for 6 h after which time 1,2,4-triazole sodium salt (84 mg, 0.93 mmol) was added and the reaction stirred at ambient temperature for a further 18 h. The solvent was removed in vacuo and the residue purified by silica gel chromatography eluting with dichloromethane on a gradient of methanol (0-10%). Further purification by high performance liquid chromatography gave 3′-[7-([1,2,4]triazol-1-ylmethyl)imidazo[1,2-a]pyrimidin-3-yl]biphenyl-2-carbonitrile (15.3 mg): δH (400 MHz, DMSO) 5.76 (2H, s), 7.32 (1H, d, J 7), 7.52-7.84 (8H, m), 8.16 (2H, d, J 5), 8.73 (1H, s), 9.22 (1H, s); m/z (ES+) 378 (M++H).

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