反应条件
1: 1.) AcOH, 2.) TsOH / 2.) RT, overnight
2: 1.) LDA, HPMA / 1.) THF, -75 deg C, 30 min, 2.) THF, from -75 deg C to RT, 4 h
3: 15percent H2SO4, AcOH / tetrahydrofuran / 16 h / Heating
4: aq. KOH / 1 h / Heating
View Scheme
参考文献
Laredo, Georgina Cecilia; Maldonado, Luis Angel
Heterocycles, 1987 , vol. 25, p. 179 - 182