作者:Samuel Braverman、Tatiana Pechenick-Azizi、Dan T. Major、Milon Sprecher
DOI:10.1021/jo071085q
日期:2007.8.31
The reaction of β-iodo-α,β-unsaturated γ-sultones (i.e., 4-halo-1,2-oxathiole 2,2-dioxides) in aprotic polar solvents such as DMSO or acetone, with ‘soft' nucleophiles such as iodide or thioacetate, yields an allenesulfonate by a very facile halophilic ring-opening E2-elimination. The ‘harder' nucleophile, azide ion, reacts under the same conditions to yield the corresponding β-azido-α,β-unsaturated