反应条件
1: Heating 2: 1.) triethyloxonium fluoroborate / 1.) ClCH2CH2Cl, reflux 16 h 3: 1.) t-butyllithium / 1.) -78 deg C, THF, 45 min at -25 deg C, 2.) -78 deg C, THF, 1 h up to -30 deg C 4: 2N KOH / dimethylsulfoxide / 3.5 h / heating View Scheme
参考文献
Tetrahedron Letters, , vol. 22, # 51 p. 5119 - 5122
