2016年11月17日木曜日

Cu Mediated Directed Nitration 2011


Copper-Mediated Chelation-Assisted Ortho Nitration of (Hetero)arenes

Department of Chemistry, Northeast Normal University, Changchun 130024, China, and State Key Laboratory of Fine Chemicals, School of Chemical Engineering, University of Technology, Dalian 116012, China
Org. Lett., 2011, 13 (24), pp 6536–6539
DOI: 10.1021/ol2028288
Publication Date (Web): November 11, 2011
Copyright © 2011 American Chemical Society
bixh507@nenu.edu.cn; liuqun@nenu.edu.cn,
Northeast Normal University.
,
University of Technology.

Abstract

Abstract Image
A novel copper-mediated chelation-assisted ortho C–H nitration of (hetero)arenes has been developed for the first time, which used dioxygen as terminal oxidant and 1,2,3-TCP as solvent, leading to the synthesis of nitroaromatics with excellent regioselectivity and in good yields. Mechanistic investigations indicate a mechanism involving a four-centered transition state, with simultaneous cleavage of an ortho C–H bond and a N–O bond of the nitrate anion on the 2-arylpyridine-coordinated copper(II) complex.

Supporting Information


Experimental procedures, spectra, and analytical data for 2a/2b. This material is available free of charge via the Internet at http://pubs.acs.org.


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Metrics

Received 20 October 2011
Published online 11 November 2011
Published in print 16 December 2011
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