Abstract
This report describes the behavior of four 1-amino-2-phenyl-1-cyclohexanecarboxylic acids, obtained in enantiomerically pure form starting from asymmetric Diels-Alder reactions between 1,3-butadiene and chiral (E)-2-cyanocinnamates, as chiral auxiliaries in the asymmetric Diels-Alder reactions of cyclopentadiene with chiral methyl N-acryloyl-1-amino-2-phenyl-1-cyclohexane-carboxylates. A model based on the formation of an intramolecular hydrogen bond accounts for the stereochemical outcome in the catalyzed reactions.
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