反应条件
1: 60 percent / p-toluenesulfonic acid / CH2Cl2 / 1.5 h 2: 92 percent / oxidation 3: 1.) potassium t-butoxide / 1.) THF, -20 deg C 2h; 2.) THF, -13 deg C, rt 12 h 4: 80 percent / p-toluenesulfonic acid / methanol / 1.) rt 40 min; 2.) 50 deg C 2.5 h View Scheme
参考文献
Yamagiwa, Yoshiro; Ohashi, Kinji; Sakamoto, Yoshitaka; Hirakawa, Shinji; Kamikawa, Tadao; Kubo, Isao
Tetrahedron, 1987 , vol. 43, # 15 p. 3387 - 3394
