title: Synthesis of functionalized hydroquinones via [Cp*RuCl2]2-catalyzed cocyclization of alkynes, alpha,beta-unsaturated carbonyl compounds, and carbon monoxide.
abstract: [reaction: see text] Catalytic [2 + 2 + 1 + 1] cocyclization reaction of an alkyne, an alkene, and two molecules of carbon monoxide, leading to functionalized hydroquinones, was studied. Using [Cp*RuCl2]2 as a catalyst, we found that a variety of electron-deficient alkenes, such as alpha,beta-unsaturated ketones, esters, amides, and nitriles, can be employed as an alkene coupling partner to give the corresponding hydroquinones.
authors.affiliation: Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan.
authors.forename: Takahide
authors.initials: T
authors.lastname: Fukuyama
authors.forename: Ryo
authors.initials: R
authors.lastname: Yamaura
authors.forename: Yuki
authors.initials: Y
authors.lastname: Higashibeppu
authors.forename: Takahiro
authors.initials: T
authors.lastname: Okamura
authors.forename: Ilhyong
authors.initials: I
authors.lastname: Ryu
authors.forename: Teruyuki
authors.initials: T
authors.lastname: Kondo
authors.forename: Take-aki
authors.initials: TA
authors.lastname: Mitsudo