Assembly of indole-2-carboxylic acid esters through a ligand-free copper-catalysed cascade process

Qian Cai; Zhengqiu Li; Jiajia Wei; Chengyong Ha; Duanqing Pei; Ke Ding

doi:10.1039/B918345K

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Chemical Communications

Issue 48, 2009

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Assembly of indole-2-carboxylic acid esters through a ligand-free copper-catalysed cascade process

Qian Cai , Zhengqiu Li , Jiajia Wei , Chengyong Ha , Duanqing Pei and Ke Ding

Chem. Commun., 2009, 7581-7583

DOI: 10.1039/B918345K
Received 07 Sep 2009, Accepted 16 Oct 2009
First published on the web 04 Nov 2009

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Abstract
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A straightforward synthesis of indole-2-carboxylic esters was developed through a ligand-free copper-catalysed condensation/coupling/deformylation cascade process from 2-halo aryl aldehydes or ketones with ethyl isocyanoacetate. The reactions proceeded well for most of the 2-iodo-, bromo-, and chloro-subtrates under room temperature or mild conditions.

Abstract from Methods in Organic Synthesis 2010

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Abstract from Catalysts & Catalysed Reactions 2010

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Supplementary Info

Experimental Section, ¹H NMR, ¹³C NMR and HRMS spectra of all new compounds
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Qian Cai
Zhengqiu Li
Jiajia Wei
Chengyong Ha
Duanqing Pei
Ke Ding

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Chemical Communications

Assembly of indole-2-carboxylic acid esters through a ligand-free copper-catalysed cascade process

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