Abstract
Diels-Alder reactions of silyloxydiene 1 derived from 1-acetylcyclohexene with imines 2b and 2c occur with high exo selectivity depending upon experimental conditions: exo cycloadducts 3b–c are exclusively formed under kinetic control using tert-butyldimethylsilytriflate as catalyst. In the presence of AlCl 3, under thermodynamic control, high endo selectivity is only observed with 2b.
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