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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 34, 2004 - Issue 24
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Original Articles

One‐Pot Synthesis of 2‐Amino‐4‐aryl‐3‐carbalkoxy‐7,7‐dimethyl‐5,6,7,8‐tetrahydrobenzo[b]pyran Derivatives Catalyzed by KF/Basic Al2O3 Under Ultrasound Irradiation

Ji‐Tai Li College of Chemistry and Environmental Science, Hebei University, Key Laboratory of Analytical Science and Technology of Hebei Province, Hezno Road No. 88, Baoding, 071002, P. R. ChinaCorrespondence[email protected]
,
Wen‐Zhi Xu College of Chemistry and Environmental Science, Hebei University, Key Laboratory of Analytical Science and Technology of Hebei Province, Hezno Road No. 88, Baoding, 071002, P. R. China
,
Li‐Chao Yang College of Chemistry and Environmental Science, Hebei University, Key Laboratory of Analytical Science and Technology of Hebei Province, Hezno Road No. 88, Baoding, 071002, P. R. China
&
Tong‐Shuang Li College of Chemistry and Environmental Science, Hebei University, Key Laboratory of Analytical Science and Technology of Hebei Province, Hezno Road No. 88, Baoding, 071002, P. R. China
Pages 4565-4571 | Received 01 Jul 2004, Published online: 12 Jan 2011
 
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Abstract

Synthesis of 2‐amino‐4‐aryl‐3‐carbalkoxy‐7,7‐dimethyl‐5‐oxo‐5,6,7,8‐tertrahydrobenzo[b]pyran derivatives was carried out in 81–98% yields by one‐pot condensation of aromatic aldehydes with cyanoacetic esters and 5,5‐dimethyl‐1,3‐cyclohexanedione catalyzed by KF/basic Al2O3 at room temperature under ultrasound irradiation.

Acknowledgments

The project was supported by Educational Ministry of China and Natural Science Foundation of Hebei Province (203107), P. R. China.

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