反应详情

Compound 495 (0.039 g, 0.081 mmol) was dissolved in 1,2-dimethoxyethane (0.8 mL) in a screw cap vessel. 3-(Hydroxymethyl)phenylboronic acid (0.015 g, 0.097 mmol) and saturated aqueous NaHCO3 (0.4 mL) were added. Argon was blown over the mixture and Pd(PPh3)4 (0.005 g, 0.004 mmol) was added. The reaction mixture was stirred at reflux temperature under an argon atmosphere for 2 h. H2O and EtOAc were added and the water phase was extracted with EtOAc (×2). The combined organic phases were dried (MgSO4), filtered and concentrated in vacuo. The crude product was purified by flash chromatography using EtOAc/petroleum ether (40-60) 1:1 as the eluent. This afforded the title compound as oil. 13C NMR (CDCl3) δ 196.3, 159.1 (dd), 155.5 (dd), 147.8, 141.5, 140.6, 139.6, 138.3, 137.0, 135.3, 133.7, 131.8, 129.4, 129.1, 128.0, 126.3, 126.0, 125.6, 124.4 (dd), 124.3 (dd), 116.3, 112.8, 111.6 (dd), 104.9 (dd), 65.3, 20.1

1. customcap vessel
2. additionwas added
3. temperatureat reflux temperature under an argon atmosphere for 2 h
4. extractionthe water phase was extracted with EtOAc (×2)
5. dry with materialThe combined organic phases were dried (MgSO4)
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. customThe crude product was purified by flash chromatography