Synlett 2017; 28(03): 347-352
DOI: 10.1055/s-0036-1588891
letter
© Georg Thieme Verlag Stuttgart · New York

Magnetic Core-Shell Fe3O4@C-SO3H as an Efficient and Renewable ‘Green Catalyst’ for the Synthesis of O-2,3-Unsaturated Glycopyranosides

Guosheng Sun
a   School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, P. R. of China   Email: Jbzhang@chem.ecnu.edu.cn
,
Saifeng Qiu
a   School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, P. R. of China   Email: Jbzhang@chem.ecnu.edu.cn
,
Zekun Ding
a   School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, P. R. of China   Email: Jbzhang@chem.ecnu.edu.cn
,
Heshan Chen
a   School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, P. R. of China   Email: Jbzhang@chem.ecnu.edu.cn
,
Jiafen Zhou
a   School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, P. R. of China   Email: Jbzhang@chem.ecnu.edu.cn
,
Zhongfu Wang
b   School of Life Sciences, Northwest University, Xi’an, 710069, P. R. of China
,
Jianbo Zhang*
a   School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, P. R. of China   Email: Jbzhang@chem.ecnu.edu.cn
› Author Affiliations
Further Information

Publication History

Received: 23 July 2016

Accepted after revision: 06 September 2016

Publication Date:
06 October 2016 (online)


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Abstract

A magnetic core-shell solid-acid catalyst Fe3O4@C-SO3H was studied for synthesis of O-2,3-unsaturated glycosides through Ferrier rearrangement. The donors include 3,4,6-tri-O-acetyl-d-glucal and 3,4-di-O-acetyl-l-rhamnal. The acceptors consist of primary alcohols, secondary alcohols, tert-butanol, unsaturated alcohols, halogenated alcohol, sterol, sugars, and phenols. O-2,3-Unsaturated glycosides were obtained rapidly (<3 h) and efficiently (up to 98%) in good α selectivity (α/β >5:1 to 19:1). Moreover, the catalyst can be easily separated from the reaction with an external magnetic force and reused for a minimum of five times without any significant decrease in the yields of the products after every recycle, suggesting it a promising green catalyst in 2,3-unsaturated glycosides syntheses.

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