反应条件
1: 2.) conc. H2SO4, aq. AcOH / 1.) Et2O, 0 deg C to RT, 14 h, 2.) reflux, 7 h
2: 1.) Et2O*BF3, 2.) N,N-diisopropyl ethylamine / 1.) CH2Cl2, 0 deg C, 15 min, 2.) CH2Cl2, -20 deg C to -10 deg C, 2 h
View Scheme
参考文献
Gupta, Ratna Das; Brindaban, Ranu C.; Ghatak, Ushua Ranjan
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1983 , vol. 22, # 7 p. 619 - 620
