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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 48, 2018 - Issue 2
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Original Articles

Greener route for the synthesis of photo- and thermochromic spiropyrans using a highly efficient, reusable, and biocompatible choline hydroxide in an aqueous medium

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Pages 208-215 | Received 22 Aug 2017, Published online: 15 Dec 2017
 

ABSTRACT

Here, we report the synthesis of photo- and thermochromic spiropyrans promoted by a highly efficient, biocompatible, and reusable choline hydroxide (ChOH) in greener solvent water. This procedure provides several advantages such as simple workup, mild reaction conditions, short reaction time, and high yields of the products. Furthermore, the ChOH could be reused at least five times without significantly losing its catalytic activity. The structures of the synthesized spiropyran derivatives were confirmed by several characterization methods such as 1H NMR, 13C NMR, and mass spectra.

GRAPHICAL ABSTRACT

Acknowledgments

The authors are grateful to Dr. S. T. Gadade, Principal, Changu Kana Thakur Arts, Commerce and Science College, New Panvel, Maharashtra 410206, India for providing laboratory and other facilities.

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