nitric acid; urea 1.) from -12 deg C to -5 deg C, 20 min, 2.) reflux, 5 h; Yield given. Multistep reaction. Yields of byproduct given;
参考文献
Kochergin, P. M.; Blinova, L. S.
Russian Journal of Organic Chemistry, 1994 , vol. 30, # 10.1 p. 1556 - 1558
Zhurnal Organicheskoi Khimii, 1994 , vol. 30, # 10 p. 1478 - 1480