Pericyclic umpolung. Reversal of regioselectivity in the diels-alder reaction
作者:K.J. Shea、Andrew J. Staab、Kathleen S. Zandi
DOI:10.1016/0040-4039(91)85066-e
日期:1991.6
New methodology is reported which enables reversal of regiochemistry in the Diels-Alder reaction. Esterification of 2-(β-hydroxyethyl)dimerhylsilydienes with common dienophiles followed by type 2 intramolecular Diels-Alder reaction results in formation of a single regio- and stereoisomer. Oxidative cleavage of the cycloadduct produces a cyclohexanone with a substitution pattern opposite of that found