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Synfacts 2023; 19(07): 0697
DOI: 10.1055/s-0042-1752601
Polymer-Supported Synthesis

Cross-Dehydrogenative C(sp2)–N Coupling by a Cu–Co Dual-Atom Catalyst Supported on Hierarchical Zeolite

Contributor(s):
Yasuhiro Uozumi
,
Teruki Takahashi
Huang B, *, Liang T, *, Lo TW. B. *, et al. The Hong Kong Polytechnic University, Shenzhen and Hong Kong, and Guangxi University, Nanning, P. R. of China
Cu–Co Dual-Atom Catalysts Supported on Hierarchical USY Zeolites for an Efficient Cross-Dehydrogenative C(sp2)–N Coupling Reaction.

J. Am. Chem. Soc. 2023;
145: 8464-8473
DOI: 10.1021/jacs.3c00114
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Key words

copper catalysis - zeolite - cross-dehydrogenative coupling - phenols - phenothiazines

Significance

A copper–cobalt dual-atom catalyst supported on hierarchical USY zeolites (Cu–Co–Y), prepared according to eq. 1, promoted the cross-dehydrogenative coupling of unprotected phenols with phenothiazines and phenoxazine under an O2 atmosphere to give the corresponding C–N-coupled products in up to 82% yield (eq. 2).


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Comment

Cu–Co–Y was characterized by means of N2 adsorption-desorption isotherm, XRF, MALDI-TOF/TOF-MS, SXRD, TEM, EDX, UV/Vis, XPS, and XANES analyses. In the reaction of 4-methoxyphenol with phenothiazine, the catalyst was recovered and reused four times with gradual loss of its catalytic activity (fresh: 81%, 6th run: 65%).


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Publication History

Article published online:
16 June 2023

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