Abstract
Zinc enolates formed from 1-aryl-2,2-dibromoalkanones and zinc react with 2-oxo-2H-chromene-3-carboxylates to give aryl 1-alkyl-1-aroyl-2-oxo-1a,7b-dihydro-1H-cyclopropa[c]chromene-1a-carboxylates as a single geometric isomer. The reaction of the same zinc enolates with 2-oxo-2H-chromene-3-carboxyl chloride to form 2-bromo-1-arylalkenyl 1-alkyl-1-aroyl-2-oxo-1,7b-dihydro-1H-cyclopropa[c]chromene-1a-carboxylates.
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Shchepin, V.V., Kalyuzhnyi, M.M., and Shchepin, R.V., Khim. Geterotsikl. Soedin., 2001, no. 10, p. 1415.
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Translated from Zhurnal Obshchei Khimii, Vol. 75, No. 9, 2005, pp. 1525–1527.
Original Russian Text Copyright © 2005 by Shchepin, Kalyuzhnyi, Russkikh.
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Shchepin, V.V., Kalyuzhnyi, M.M. & Russkikh, N.Y. Reaction of Zinc Enolates Formed from 1-Aryl-2,2-dibromoalkanones and Zinc, with Aryl Esters and Chloride of 2-Oxo-2H-chromene-3-carboxylic Acid. Russ J Gen Chem 75, 1452–1454 (2005). https://doi.org/10.1007/s11176-005-0444-2
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DOI: https://doi.org/10.1007/s11176-005-0444-2