trifluoroacetic acid in tert-butyl alcohol T=60 - 70°C; free hydrazine from hydrochloride and 1 N NaOH in toluene;
参考文献
Conn, Robin S. Eichen; Douglas, Alan W.; Karady, Sandor; Corley, Edward G.; Lovell, Alfred V.; Shinkai, Ichiro
Journal of Organic Chemistry, 1990 , vol. 55, # 9 p. 2908 - 2913
