1: in N,N-dimethyl-formamide
T=135 - 140°C; 70 h;
2: With formaldehyd; sodium acetate; acetic acid in water
T=20°C; 2 h; Title compound not separated from byproducts;
参考文献
Braukmueller, Stefan; Brueckner, Reinhard
European Journal of Organic Chemistry, 2006 , # 9 p. 2110 - 2118