Synthesis 2007(23): 3673-3677  
DOI: 10.1055/s-2007-990889
PAPER
© Georg Thieme Verlag Stuttgart · New York

Efficient N-Aroylation of Substituted Indoles with N-Aroylbenzotriazoles

Alan R. Katritzky*a, Levan Khelashvilia, Prabhu P. Mohapatraa, Peter J. Steelb
a Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611-7200, USA
b Chemistry Department, University of Canterbury, Christchurch, New Zealand
Fax: +1(352)3929199; e-Mail: katritzky@chem.ufl.edu;
Further Information

Publication History

Received 12 April 2007
Publication Date:
13 November 2007 (online)

Abstract

Stable and easily accessible N-aroylbenzotriazoles react with indoles in the presence of a base to afford the corresponding N-aroylindoles in yields averaging 70%. This method is effective even when both coupling reagents possess electron-donating substituents.

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Crystal data for 3f: C17H15NO3, MW 281.30, monoclinic, space group Cc, a = 15.1850 (14), b = 4.3143 (4), c = 21.398 (2) Å, β = 103.703 (3)°, V = 1362.0(2) Å3, F(000) = 592, Z = 4, T = -170 °C, µ (MoKα) = 0.095 mm-1, Dcalcd = 1.372 g.cm-3, 2θmax 50° APEX II CCD area detector, MoKα radiation, SHELXS and SHELXL, GOF = 1.08, wR(F2) = 0.074 (all 2244 data), R = 0.029 (2039 data with I > 2σI). CCDC # 639667. Copies of the crystal data can be obtained free of charge from CCDC, 12, Union Road, Cambridge CB2 1EZ, UK; fax: + 44 1223 336 033; e-mail: deposit@ccdc.cam.ac.uk.