Issue 35, 2020

Uniform Cu/chitosan beads as a green and reusable catalyst for facile synthesis of imines via oxidative coupling reaction

Abstract

A nonprecious metal and biopolymer-based catalyst, Cu/chitosan beads, has been successfully prepared by using a software-controlled flow system. Uniform, spherical Cu/chitosan beads can be obtained with diameters in millimeter-scale and narrow size distribution (0.78 ± 0.04 mm). The size and morphology of the Cu/chitosan beads are reproducible due to high precision of the flow rate. In addition, the application of the Cu/chitosan beads as a green and reusable catalyst has been demonstrated using a convenient and efficient protocol for the direct synthesis of imines via the oxidative self- and cross-coupling of amines (24 examples) with moderate to excellent yields. Importantly, the beads are stable and could be reused more than ten times without loss of the catalytic performance. Furthermore, because of the bead morphology, the Cu/chitosan catalyst has greatly simplified recycling and workup procedures.

Graphical abstract: Uniform Cu/chitosan beads as a green and reusable catalyst for facile synthesis of imines via oxidative coupling reaction

Supplementary files

Article information

Article type
Paper
Submitted
30 Apr 2020
Accepted
25 May 2020
First published
02 Jun 2020
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2020,10, 21009-21018

Uniform Cu/chitosan beads as a green and reusable catalyst for facile synthesis of imines via oxidative coupling reaction

T. Chutimasakul, P. Na Nakhonpanom, W. Tirdtrakool, A. Intanin, T. Bunchuay, R. Chantiwas and J. Tantirungrotechai, RSC Adv., 2020, 10, 21009 DOI: 10.1039/D0RA03884A

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