Citation: Ezzat Rafiee, Fereshte Khajooei Nejad, Mohammad Joshaghani. Cs_xH_3-xPW₁₂O₄₀ heteropoly salts catalyzed quinoline synthesis via Friedlander reaction[J]. Chinese Chemical Letters, ;2011, 22(3): 288-291. doi: 10.1016/j.cclet.2010.09.036 shu

Cs_xH_3-xPW₁₂O₄₀ heteropoly salts catalyzed quinoline synthesis via Friedlander reaction

a Faculty of Chemistry, Razi University, Kermanshah 67149, Iran;
b Kermanshah Oil Refining Company, Kermanshah, Iran

Received Date: 17 June 2010

Fund Project: The authors thank the Razi University Research Council and Kermanshah Oil Refining Company for support of this work.

Various type of cesium partially substituted phosphotungstate, Cs_xH_3-xPW₁₂O₄₀ (x=1.0, 2.0 and 2.5), were synthesized and their catalytic activities were investigated in the synthesis of quinoline. It was shown that catalytic activities of these catalysts correlated to surface acidity and total number of acidic sites. Finally, a series of quinoline derivatives were synthesized with Cs_2.5H_0.5PW₁₂O₄₀ via the Friedlander reaction in high to excellent yields and the plausible mechanism was proposed. Simple experiment, catalyst reusability, short reaction time and preclusion of toxic solvent are the advantages of this method.
- Quinoline,
- Friedlander reaction,
- Cesium Keggin salts,
- Acidity
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