1: ethyl acetate; formic acid ethyl ester With sodium in ethanol; toluene T=20°C; 16 h; 2: 5-amino-1H-pyrazole-4-carboxylic acid ethyl ester in ethanol; toluene T=80°C; 4 h; Further stages.;
参考文献
Gavrin, Lori K.; Lee, Arthur; Provencher, Brian A.; Massefski, Walter W.; Huhn, Stephen D.; Ciszewski, Gregory M.; Cole, Derek C.; McKew, John C.
Journal of Organic Chemistry, 2007 , vol. 72, # 3 p. 1043 - 1046