Green and efficient synthesis of pyrazolo[3,4-b]quinolin-5-ones derivatives by microwave-assisted multicomponent reaction in hot water medium
作者:Anastasiya Yu. Andriushchenko、Sergey M. Desenko、Vitaliy N. Chernenko、Valentin A. Chebanov
DOI:10.1002/jhet.586
日期:2011.3
Novel simple, efficient, and eco‐friendly synthetic procedure for preparation of pyrazolo[3,4‐b]quinolin‐5‐ones based on three‐component microwaves‐assisted heterocyclization reaction of 5‐aminopyrazoles, aromatic aldehydes, and dimedone in hot‐watermedium was developed. The new method allows obtaining target heterocycles in good and excellent yields and with high degree of purity. J. Heterocyclic
<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