Copper-Chitosan Beads as Efficient and Recyclable Heterogeneous Catalysts for C−H Oxidation and C−X Amination
5
Issued Date
2022-11-18
Resource Type
eISSN
23656549
Scopus ID
2-s2.0-85142393299
Journal Title
ChemistrySelect
Volume
7
Issue
43
Rights Holder(s)
SCOPUS
Bibliographic Citation
ChemistrySelect Vol.7 No.43 (2022)
Suggested Citation
Kanarat J., Bunchuay T., Chutimasakul T., Limprasart W., Unlum J., Tantirungrotechai J. Copper-Chitosan Beads as Efficient and Recyclable Heterogeneous Catalysts for C−H Oxidation and C−X Amination. ChemistrySelect Vol.7 No.43 (2022). doi:10.1002/slct.202202517 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/84143
Title
Copper-Chitosan Beads as Efficient and Recyclable Heterogeneous Catalysts for C−H Oxidation and C−X Amination
Author's Affiliation
Other Contributor(s)
Abstract
Uniform millimeter-sized copper-incorporated chitosan beads were easily prepared via a simple synthetic method as efficient bifunctional heterogeneous catalysts for C−H oxidation of alkylarenes to ketones and C−X amination of aryl halides with ammonia. These potent catalysts were compatible to various substrates, resulting in 2–97 and 39–99 % yields for the oxidation and amination reactions, respectively. Moreover, we highlight the dual roles of chitosan that it not only served as a versatile support to enhance the catalytic performance of copper active species, but it also acted as a base to promote the catalytic reactions. The catalysts are robust and could be employed under conventional heating or microwave irradiation for several times without deactivation or deformation. The bead shape of the catalysts provides easy separation and recyclability. Thus, chitosan and this preparation method may be exploited in the development of other transition metal catalyst beads for valuable organic reactions.