BF3·Et2O catalyzed transannulation of pyridotriazoles with isothiocyanates: synthesis of thiazolo[3,4-a]pyridin-3-imines

The synthesis of thiazolo[3,4-a]pyridin-3-imines through the denitrogenative transannulation of pyridotriazoles with isothiocyanates using BF3·Et2O as a catalyst is described. A combination of solvents (dichlorobenzene-dichloroethane) plays a crucial role in obtaining the desired products under transition metal-free conditions.