反应详情

To a mixture of PPh3 (0.53 g, 2.03 mmol) and DIAD (0.4 mL, 2.03 mmol) in dry THF (3 mL) at 0° C. was added a mixture of (2-methoxy-pyridin-3-yl)-methanol (0.18 g, 1.27 mmol) from Step A and 4′-bromo-biphenyl-4-ol (0.33 g, 1.33 mmol) in dry THF (2 mL). After 1 hr, the reaction was warmed to room temperature and monitored by TLC. After the reaction was completed (˜4 h), the reaction mixture was concentrated under vacuo and then diluted with EtOAc. The precipitates were filtered. The filtrate was brought to the usual work-up. The resulting crude product was purified by chromatography (silica gel, 15% EtOAc/hexanes) to give the titled compound. MS: 370, 372 (M+H)+.

1. additionwas added
2. custom(˜4 h)
3. concentrationthe reaction mixture was concentrated under vacuo
4. additiondiluted with EtOAc
5. filtrationThe precipitates were filtered
6. customThe resulting crude product was purified by chromatography (silica gel, 15% EtOAc/hexanes)