Journal
CHEMISTRYOPEN
Volume 9, Issue 6, Pages 662-666Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/open.202000112
Keywords
cycloaddition reactions; Lewis acids; density functional calculations; orbital interactions
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The Diels-Alder reaction of cyclopentadiene with methyl acrylate catalyzed by AlCl(3)has been theoretically investigated. M06-2X level DFT calculations have shown that the formation of two C-C bonds is asynchronous in the cycloaddition both in theendopath and in theexopath, thus making a good contrast to the well-known concept of [4+2] reactions based on the orbital symmetry arguments. It was found that the catalyst facilitates the cycloaddition and brings a higherendoselectivity in the highly asynchronous process, as compared with the reaction of the diene and the dienophile without the catalyst.
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