反应条件
1: 98 percent / benzene / 24 h / Heating 2: 1.) LDA / 1.) THF, 0 deg C, 2 h, 2.) THF, 15 h 3: 1.) K2CO3, 2.) (CO2H)2 / 1.) MeOH, reflux, 3 h, 2.) Et2O, H2O 4: NCS / CCl4 / 15 h / Ambient temperature 5: 0.21 g / NaOMe / methanol / 20 h / Ambient temperature View Scheme
参考文献
Tetrahedron, , vol. 54, # 11 p. 2365 - 2370