1: acetic anhydride / 5 h / 80 °C
2: 18 g / conc. H2SO4 / 1 h / 50 - 60 °C
View Scheme
参考文献
Hussain, Zakir; Hopf, Henning; Pohl, Ludwig; Oeser, Thomas; Fischer, Axel K.; Jones, Peter G.
European Journal of Organic Chemistry, 2006 , # 24 p. 5555 - 5569