Abstract
It has been revealed that the copper(II) triflate catalyzed reaction of ethyl-2-diazo-3-oxobutanoate with phenols followed by cyclization of the intermediate enol in the presence of polyphosphoric acid is a simple and efficient method of synthesis of polysubstituted benzofurans. The use of pyrocatechol leads to the corresponding substituted 1,4-benzodioxine-2-carboxylates as major products.
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Original Russian Text © G.N. Sakhabutdinova, G.Z. Raskil’dina, S.S. Zlotskii, R.M. Sultanova, 2018, published in Doklady Akademii Nauk, 2018, Vol. 482, No. 5.
Presented by Academician A.A. Berlin June 4, 2018
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Sakhabutdinova, G.N., Raskil’dina, G.Z., Zlotskii, S.S. et al. New One-Pot Synthesis of Polysubstituted Benzofurans and Benzo-1,4-dioxines. Dokl Chem 482, 233–236 (2018). https://doi.org/10.1134/S0012500818100051
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DOI: https://doi.org/10.1134/S0012500818100051