反应详情

To a mixture of 2-(5-hydroxy-1H-pyrazol-1-yl)pyridine-4-carbonitrile (185 mg, 0.99 mmol), 4-fluorobenzyl alcohol (188 mg, 1.49 mol), PPh3 (391 mg, 1.49 mmol) and THF (4 mL) cooled in an ice-water bath, TMAD (257 mg, 1.49 mmol) was added. The reaction mixture was stirred overnight at rt, filtered, and concentrated before purification by prep-HPLC to give the title compound (40 mg, 13%). 1H NMR (400 MHz, CDCl3): δ 5.14 (2H, s), 5.68 (1H, s), 7.00-7.05 (2H, m), 7.33-7.36 (3H, m), 7.52 (1H, s), 7.96 (1H, s), 8.64 (1H, s). [M+H] Calc'd for C16H11FN4O, 295; Found, 295.

1. temperaturecooled in an ice-water bath
2. filtrationfiltered
3. concentrationconcentrated before purification by prep-HPLC