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Download filePalladium/N‑Heterocyclic Carbene (NHC)-Catalyzed Asymmetric [3 + 2] Cycloaddition Reaction of Vinyl Epoxides with Allenic Amides
journal contribution
posted on 2018-08-06, 15:03 authored by Wan-Ying Wang, Jing-Yu Wu, Qing-Rong Liu, Xiu-Yan Liu, Chang-Hua Ding, Xue-Long HouAllenic amides are successfully developed
as dipolarophiles to
react with vinyl epoxides under Pd-catalysis. The chiral NHC showed
its unique role as the ligand in this asymmetric [3 + 2] cycloaddition.
Chiral tetrahydrofurans bearing three functional groups (monosubstituted
alkene, tetrasubstituted enolether, and amide) and vicinal tertiary
and quaternary stereocenters were obtained in high yields with high
diastereo- and enantioselectivities.
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Keywords
vicinaltetrasubstituted enoletherAllenic Amides Allenic amidesliganddiastereoAsymmetricChiral tetrahydrofuransvinyl epoxidescycloadditionmonosubstituted alkeneroleCarbenePalladiumdipolarophileHeterocyclicquaternary stereocentersVinyl Epoxideschiral NHCyieldPd-catalysienantioselectivitieCycloaddition
