<scp>l</scp>-Proline as an efficient enantioinduction organo-catalyst in the solvent-free synthesis of pyrazolo[3,4-b]quinoline derivatives via one-pot multi-component reaction
The role of L-proline as an efficient organo-catalyst for the three-component synthesis of pyrazoloquinolinones involving dimedone, 3-methyl-1H-pyrazol-5-amine and various aryl aldehydes under mild solvent-free condition is reported. Besides the several advantages offered by this method such as its generality, simplicity, high yields and environment friendly reaction, the most notable is the ability