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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 40, 2010 - Issue 23
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Original Articles

Bromamine-B/PdCl2 is an Efficient System for the Synthesis of Anthranilic Acids from Indoles and Indigos

C. H. Vinod Kumar Department of Chemistry, Sri Venkateswara University, Tirupati, India
,
K. N. Shivananda Schulich Faculty of Chemistry, Technion – Israel Institute of Technology, Technion City, Haifa, Israel
,
C. Nagu Raju Department of Chemistry, Sri Venkateswara University, Tirupati, India
&
R. V. Jagadeesh Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Rostock, GermanyCorrespondence[email protected]
Pages 3480-3487 | Received 11 Aug 2009, Published online: 05 Nov 2010
 
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Abstract

A convenient method has been developed for the conversion of indoles and indigos into anthranilic acids in good to excellent yields using a bromamine-B/PdCl2 system. The general process utilizes our efficient method for the oxidation of indoles and indigos in alkaline (pH 12) acetonitrile/water (1:1) at 60 °C.

Notes

Note. Melting points given in parantheses refer to authentic samples.

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