Tri-n-butylstannyl radical induced rearrangement of homopropargyl (but-3-ynyl) arenesulfonates: a route to novel 4-aryl-5,6-dihydro-1,2-oxathiin 2,2-dioxides
作者:William B. Motherwell、Andrew M. K. Pennell、Feroze Ujjainwalla
DOI:10.1039/c39920001067
日期:——
Addition of a tri-n-butylstannyl radical to arenesulfonate esters of the homopropargyl alcohol 1, leads, via ipso-substitution and subsequent 6-endo addition–elimination, to the title derivatives 5.
Mechanistic Evidence for a Novel Rearrangement Sequence in the Synthesis of 4-Aryl-5,6-dihydro-1,2-oxathiine-2,2-dioxides from Homopropargyl Benzosulfonates
作者:Wei Zhang、Georgia Pugh
DOI:10.1055/s-2002-25367
日期:——
reaction of homopropargyl benzosulfonates 1 initiated a novel rearrangement sequence and led to formation of two kinds of cyclic sultones: 4-aryl-5,6-dihydro-1,2-oxathiin-2,2-dioxides 2 and 4-aryl-3-tributyltin-1,2-oxathiane-2,2-dioxides 7. Isolation and X-ray structure characterization of previously unreported cyclic α-tributyltin sultones 7 provided evidence for a cyclization-fragmentation-cyclization