反应条件
1: NaH / dimethylformamide / 90 - 100 °C 2: 1.) triflic anhydride, collidine, 2.) H2O / Multistep reaction. Intramolecular <2+2> cycloaddition of keteniminium salt. View Scheme
参考文献
Gobeaux, Benoit; Ghosez, Leon
Heterocycles, 1989 , vol. 28, # 1 p. 29 - 32
