title: Selective cleavage of allyl and propargyl ethers to alcohols catalyzed by Ti(O-i-Pr)4/MXn/Mg.
abstract: [reaction: see text] Allyl and propargyl ethers were effectively deallylated or depropargylated to the parent alcohols via a C-O bond cleavage catalyzed by a low-valent titanium reagent (LVT), Ti(O-i-Pr)4/TMSCl/Mg or Ti(O-i-Pr)4/MgBr2/Mg, under mild reaction conditions. Differentiation between the allyl and propargyl ethers was achieved by the reaction in the presence of AcOEt as an additive. The reagent also catalyzed intra- and intermolecular cyclotrimerization reactions of alkynes to substituted benzenes.
authors.affiliation: Department of Material & Life Chemistry, Kanagawa University, 3-27-1 Rokkakubashi, Yokohama 221-8686, Japan.
authors.forename: Mutsumi
authors.initials: M
authors.lastname: Ohkubo
authors.forename: Sayaka
authors.initials: S
authors.lastname: Mochizuki
authors.forename: Takeshi
authors.initials: T
authors.lastname: Sano
authors.forename: Yuuki
authors.initials: Y
authors.lastname: Kawaguchi
authors.forename: Sentaro
authors.initials: S
authors.lastname: Okamoto