1: 61 percent / 1.) 0.5 M NaOH; 2.) 2 M HCl / ethanol
2: 89 percent / triethylamine / acetic anhydride / 3 h / 110 °C / in the presence of various bases
View Scheme
参考文献
Horaguchi, Takaaki; Matsuda, Shinichi; Tanemura, Kiyoshi; Suzuki, Tsuneo
Journal of Heterocyclic Chemistry, 1987 , vol. 24, p. 965 - 969