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]

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.

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Notes

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

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

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

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