1: ethyl 2-oxo-cyclohexanecarboxylate With potassium hydroxide in water T=0 - 30°C; Japp-Klingemann reaction; 4 h; 2: benzene diazonium chloride in water T=0°C; Japp-Klingemann reaction; 3: With formic acid in water T=80°C; Fischer cyclization; 12 h;
参考文献
Gehring, Andrep.; Bracher, Franz
Synthesis (Germany), 2012 , vol. 44, # 15 p. 2441 - 2447