tetra(n-butyl)ammonium hydrogensulfate in sodium hydroxide; dichloromethane
16 h; Yield of cyclisation depending on N substituent; Product distribution;
参考文献
Napolitano, Elio; Fiaschi, Rita; Marsili, Antonio
Tetrahedron Letters, 1983 , vol. 24, # 12 p. 1319 - 1320