Lewis acid induced tandem Diels-Alder reaction/ring expansion as an equivalent of a [4 + 3] cycloaddition.
Aluminum chloride induced reaction between cyclopentadiene and alpha,beta-unsaturated aldehydes results in the stereoselective formation of the products of a formal [4 + 3] cycloaddition. The reaction proceeds by a tandem Diels-Alder reaction/ring expansion.
Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, USA. hdavies@acsu.buffalo.edu
Huw M L
HM
Davies
Xing
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Dai