反应条件
1: 1.) n-butyllithium / 1.) THF, pentane, -15 deg C, 1.5 h, 2.) THF, pentane, RT, 6 h 2: 1.) Na2CO3, Br2, 2.) pTsOH, 3.) iodine 3: 1.) potassium tert-butoxide / 1.) THF, 0 deg C, 10 min, 2.) THF, 0 deg C, 5 min 4: 70 percent / sodium borohydride / methanol / 0.08 h / 0 °C View Scheme
参考文献
Gunn, Bruce P.
Heterocycles, 1985 , vol. 23, # 12 p. 3061 - 3067
