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Open AccessArticle

An Environmentally Benign Protocol for Aqueous Synthesis of Tetrahydrobenzo[b]Pyrans Catalyzed by Cost-Effective Ionic Liquid

by Huanan Hu 1,2, Fangli Qiu 1,2, Anguo Ying 1,2,*, Jianguo Yang 1,2,* and Haiping Meng 2
1
Institute of Applied Chemistry, Taizhou University, Taizhou 318000, China
2
School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 318000, China
*
Authors to whom correspondence should be addressed.
Int. J. Mol. Sci. 2014, 15(4), 6897-6909; https://doi.org/10.3390/ijms15046897
Received: 28 February 2014 / Revised: 30 March 2014 / Accepted: 8 April 2014 / Published: 22 April 2014
(This article belongs to the Special Issue Ionic Liquids 2014 & Selected Papers from ILMAT 2013)
A mild, efficient, and environmentally benign protocol for the synthesis of tetrahydrobenzo[b]pyran derivatives in the presence of readily accessible, biodegradable, and choline hydroxide based ionic liquid as catalyst has been established. The key features of the reported methodology include good to excellent yields of desired products, simple work-up procedure and good recyclability of catalysts, which may be a practical alternative to the existing conventional processes for the preparation of 4-H pyrans to cater to the requirements of academia as well as industry. View Full-Text
Keywords: pyran; choline hydroxide; ionic liquid; cost-effectiveness; biodegradability; recyclability pyran; choline hydroxide; ionic liquid; cost-effectiveness; biodegradability; recyclability
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Hu, H.; Qiu, F.; Ying, A.; Yang, J.; Meng, H. An Environmentally Benign Protocol for Aqueous Synthesis of Tetrahydrobenzo[b]Pyrans Catalyzed by Cost-Effective Ionic Liquid. Int. J. Mol. Sci. 2014, 15, 6897-6909.

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