Synthesis of highly functionalized 3,4-dihydro-2H-pyrans by high pressure lewis acid catalyzed cycloaddition of enol ethers and α,β-unsaturated aldehydes
作者:Dirk A.L. Vandenput、Hans W. Scheeren
DOI:10.1016/0040-4020(95)00449-i
日期:1995.7
New highly substituted 3,4-dibydro-2H-pyrans were synthesized with high ENDO selectivity by highpressure 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.