Molecules

Thermal [4+ 2] Cycloadditions of 3-acetyl-, 3-carbamoyl-, and 3-ethoxycarbonyl-coumarins with 2, 3-dimethyl-1, 3-butadiene under solventless conditions: a structural …

…, L López-Garrido, FJ Martínez-Martínez, J González…

Index: Flores-Larios, Irma Y.; Lopez-Garrido, Lizbeth; Martinez-Martinez, Francisco J.; Gonzalez, Jorge; Garcia-Baez, Efren V.; Cruz, Alejandro; Padilla-Martinez, Itzia I. Molecules, 2010 , vol. 15, # 3 p. 1513 - 1530

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Citation Number: 10

Abstract

Abstract The thermal [4+ 2] cycloadditions of 3-acetyl-, 3-carbamoyl, and 3- ethoxycarbonylcoumarins with 2, 3-dimethyl-1, 3-butadiene under solvent free conditions are reported, as well as the epoxidation reactions of some adducts. Discussion is focused on the structural features of the Diels-Alder adducts and their epoxides, based upon NMR, X- ray, and mass spectral data, and supported by ab initio theoretical calculations. Keywords: