Synthesis of (E)-α-Hydroxy-β,γ-Unsaturated Amides with High Selectivity fromα,β-Epoxyamides by Using Catalytic Samarium Diiodide or Triiodide
作者:José M. Concellón、Pablo L. Bernad、Eva Bardales
DOI:10.1002/chem.200305375
日期:2004.5.17
stereoselective synthesis of (E)-alpha-hydroxy-beta,gamma-unsaturated amides starting from alpha,beta-epoxyamides, by using catalytic SmI2 or SmI3, was achieved. This transformation can also be carried out by using SmI2 generated in situ from samarium powder and diiodomethane. The starting compounds1 are easily prepared by the reaction of enolates derived from alpha-chloroamides with ketones at -78 degrees