title: Synthesis of functionalized cyclic boronates.
abstract: Deprotonation of a simple borylated allylic sulfone and subsequent alkylation with certain unsaturated electrophiles provide substrates that are easily converted into functionalized alkenyl boronates with ring sizes from five- to seven-membered. A Chan-Lam reaction on one such substrate afforded an alkoxyallylic sulfone that was readily converted via a (4 + 3)-cycloaddition to a polycycle possessing the ABC ring substructure of ingenol.
authors.affiliation: Department of Chemistry, University of Missouri-Columbia , Columbia, Missouri 65211, United States.
authors.forename: Erich
authors.initials: E
authors.lastname: Altenhofer
authors.forename: Michael
authors.initials: M
authors.lastname: Harmata