POLYCYCLIC N-HETEROCYCLIC COMPOUNDS.53~1 ONE STEP SYNTHESIS OF IMIDAZO[1.5-a] PYRIDINE DERIVATIVES BY THE VILSMEIERREACTION USING N,N-DIMETHYLARYLAMIDES

摘要

Abstract-The versatile one step synthesis of 3-ary-1-(C-aryl-N,N-dimethylamin-methyleneamino)-7-chloro-2-methylimidazo[1,5-a]pyridin-2-ium chloride and their derivatives by the reaction of 2-pyridinecarbonitriles with N,N dimethylaryl-amides and phosphorus oxychloride under the Vilsmeier condition is described.The structures are based upon characteristic spectra and analytical data was well as X-Ray diffraction.