Abstract
A facile synthetic method for benzothiazoles and benzoxazoles comprising the reaction of corresponding 2-aminothiophenol and 2-aminophenol with various substituted aromatic carboxylic acids using Samarium(III) triflate as a catalyst has been described. The advantages of the method are short reaction times and aqueous reaction media and easy work-up. The catalysts can be recovered for the subsequent reactions and reused without any appreciable loss of efficiency.
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Acknowledgment
One of the authors, Mr. P.B. Gorepatil, is grateful to the Council of Scientific and Industrial Research (CSIR), New Delhi for a Junior Research Fellowship (JRF).
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Gorepatil, P.B., Mane, Y.D., Gorepatil, A.B. et al. Samarium(III) triflate: a new catalyst for facile synthesis of benzothiazoles and benzoxazoles from carboxylic acids in aqueous media. Res Chem Intermed 41, 8355–8362 (2015). https://doi.org/10.1007/s11164-014-1897-x
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DOI: https://doi.org/10.1007/s11164-014-1897-x