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Catalysts 2018, 8(2), 48; https://doi.org/10.3390/catal8020048

Highly Efficient Acetalization and Ketalization Catalyzed by Cobaloxime under Solvent-Free Condition

1
College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
2
School of Material Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
*
Author to whom correspondence should be addressed.
Received: 30 November 2017 / Revised: 21 January 2018 / Accepted: 22 January 2018 / Published: 26 January 2018
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Abstract

An efficient catalytic system was developed for the acetalization and ketalization of carbonyl compounds with polyhydric alcohols under mild solvent-free conditions. In the presence of 0.1 mol% CoCl2 and 0.2 mol% dimethylglyoxime at 70 °C under 5 KPa pressure for 1 h, 95.3% conversion of cyclohexanone and 100% selectivity of the corresponding cyclic ketal could be obtained, where TOF reached as high as 953 h−1. It is proposed that the in situ generated planartetracoordinate cobaloxime played the key role in the catalytic cycle and was responsible for the excellent catalytic performance. View Full-Text
Keywords: acetalization; ketalization; dimethylglyoxime; cobalt; cobaloxime; polyhydric alcohol acetalization; ketalization; dimethylglyoxime; cobalt; cobaloxime; polyhydric alcohol
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zong, Y.; Yang, L.; Tang, S.; Li, L.; Wang, W.; Yuan, B.; Yang, G. Highly Efficient Acetalization and Ketalization Catalyzed by Cobaloxime under Solvent-Free Condition. Catalysts 2018, 8, 48.

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