Alkynyliodonium Salts in Organic Synthesis. Preparation of 2-Substituted-3-<i>p</i>-toluenesulfonyldihydrofurans from 1-Hydroxybut-3-ynyliodonium Ethers via a Formal Stevens Shift of a Carbon Group
作者:Ken S. Feldman、Michelle Laci Wrobleski
DOI:10.1021/ol006115p
日期:2000.8.1
[GRAPHICS]p-Toluenesulfinate addition to 1-hydroxybut-3-ynyliodonium ethers triggers a sequence of reactions which ultimately delivers 2-substituted-3-p-toluenesulfonyldihydrofuran products along with 3-p-toluenesulfonyldihydrofuran as a major byproduct. A putative 1,2-alkyl shift within an unsaturated oxonium ylide (Stevens rearrangement) accounts for the oxygen-to-carbon transfer of the alkyl group.