Abstract

New highly substituted 3,4-dibydro-2H-pyrans were synthesized with high ENDO selectivity by high pressure hetero Diels Alder reactions of α,β-unsaturated aldehydes and enol ethers in the presence of lanthanide-catalysts. Chiral induction was studied using chiral catalysts, a chiral enol ether and a combination of these chiralities.

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