1: With trichlorophosphate in 1,2-dichloro-ethane
Vilsmeier-Hack formylation; 15 h; Heating;
2: With sodium acetate in 1,2-dichloro-ethane
T=20°C; 2 h;
Roquet, Sophie; Cravino, Antonio; Leriche, Philippe; Aleveque, Olivier; Frere, Pierre; Roncali, Jean
Journal of the American Chemical Society, 2006 , vol. 128, # 10 p. 3459 - 3466