1: tetrahydrofuran / 0.5 h / 40 - 50 °C 2: 2 N aq. HCl / tetrahydrofuran / 1 h / 25 - 30 °C 3: 20 g / BF3 / 4 h / 120 °C 4: 42.4 g / toluene / 1 h / 80 °C View Scheme
参考文献
Schumacher, Doris P.; Murphy, Bruce L.; Clark, Jon E.; Tahbaz, Pete; Mann, Thomas A.
Journal of Organic Chemistry, 1989 , vol. 54, # 9 p. 2242 - 2244