A New and Mild System for the Generation of Nonstabilized Carbonyl Ylides: Synthetically Practical Use in Reactions with Electron-Deficient Dipolarophiles
Extensive study has been devoted to the chemistry of carbonyl ylides, and considerable attention has focused on their use for the selective construction of oxygencontaining five- membered heterocycles. 1 We recently found the generation of nonstabilized carbonyl ylides2 from iodohydrin silyl ethers or bis (chloromethyl) ethers through the 1, 3-elimination pathway using samarium diiodide as a reductant. 3 This protocol realized the practical ...