Patent ID: 6933390

Claim:
A process for preparing compounds of general formula I, in which HETN is a pyrrol-1-yl, an imidazol-1-yl, a benzimidazol-1-yl, an indazol-1-yl, a carbazol-9-yl, or a [1,2,4]triazol-1-yl, and R1, R2, R3, R4, and R5 are independently hydrogen, nitro, cyano, alkoxycarbonyl with up to 5 carbon atoms, aldehyde, alkylcarbonyl with up to 5 carbon atoms, arylcarbonyl, or amide, provided that R1, R2, R3, R4, and R5 are not all hydrogen atoms, the process comprising: reacting an aromatic aza-heterocycle with a compound of general formula XIV, at a temperature between room temperature and about 80° C., inclusive, and in the presence of caesium carbonate and one or more dipolar aprotic solvents; wherein the aromatic aza-heterocycle is a pyrrole, an imidazole, a benzimidazole, an indazole, a carbonate, or a triazole and HAL in general formula XIV is a halogen atom.