title: Efficient C-N bond formations catalyzed by a proton-exchanged montmorillonite as a heterogeneous Brønsted acid.
abstract: Nucleophilic addition of sulfonamides and carboxamides to simple alkenes proceeded smoothly using a proton-exchanged montmorillonite catalyst. The spent catalyst was recovered easily from the reaction mixture and was reusable at least five times without any loss of activity. The unique acidity of the proton-exchanged montmorillonite (H-mont) catalyst was found to be applicable to additional reactions: substitution of hydroxyl groups of alcohols with amides and anilines.
authors.affiliation: Department of Materials Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, Japan.
authors.forename: Ken
authors.initials: K
authors.lastname: Motokura
authors.forename: Nobuaki
authors.initials: N
authors.lastname: Nakagiri
authors.forename: Kohsuke
authors.initials: K
authors.lastname: Mori
authors.forename: Tomoo
authors.initials: T
authors.lastname: Mizugaki
authors.forename: Kohki
authors.initials: K
authors.lastname: Ebitani
authors.forename: Koichiro
authors.initials: K
authors.lastname: Jitsukawa
authors.forename: Kiyotomi
authors.initials: K
authors.lastname: Kaneda