Synthesis of [1,2,3]Triazolo[1,5-a]quinoline-3-carboxamides Promoted by Organocatalyst and Base

We described here a simple and metal-free protocol to synthesize [1,2,3]triazolo[1,5-a]quinoline 3-carboxamides through a two-step synthetic strategy, in which the first step uses organocatalysis (10 mol % of diethylamine or 1,8-diazabicyclo[5.4.0]undec-7-ene, while the second step involves the use of inorganic base (1.2 or 0.1 equiv. of potassium hydroxide). These reactions were performed between & beta;-keto amides and o-carbonyl phenylazides in dimethylsulfoxide as solvent at 70 & DEG;C for 2 h. The synthetic protocol is ample, which thirteen examples of secondary [1,2,3]triazolo[1,5-a]quinoline 3-carboxamides were synthesized ranging from good to excellent yields (63-96 %), and six different tertiary [1,2,3]triazolo[1,5-a]quinolines 3-carboxamides were obtained ranging from moderate to good yields (48-76 %).