反应详情

α-Benzylacrylic acid (1.00 g, 6.17 mmol) in methanol (20 ml) was treated with BF3.Et2O (2 ml). The mixture was heated to reflux for 14 h, cooled, and poured into saturated NaHCO3 solution. Extraction with ether followed by drying over Na2SO4 and evaporation afforded 1.03 g (95%) of a mobile oil. 1H NMR (CDCl3) δ7.17-7.35 (m,5H), 6.23 (m,1H), 5.47 (m,1H), 3.74 (s,3H), 3.63 (s,2H).

1. temperatureThe mixture was heated
2. temperatureto reflux for 14 h
3. temperaturecooled
4. extractionExtraction with ether
5. dry with materialby drying over Na2SO4 and evaporation