Simple entry to new 2-alkyl-1,2,3,4-tetrahydroquinoline and 2,3-dialkylquinoline derivatives using BiCl3-catalyzed three component reactions of anilines and aliphatic aldehydes in the presence (or lack) of N-vinyl amides

A general protocol for the simple and efficient synthesis of 2-alkyl-1,2,3,4-tetrahydroquinolines and 2,3-dialkylquinolines was reported. Synthetic protocol describes the one-pot preparation of these tetrahydroquinoline and quinoline products using the same reagents (aliphatic aldehydes and anilines) in the BiCl3-catalyzed multicomponent condensation process where the third component, N-vinyl amide is present.