title: Internal Lewis acid assisted ureas: tunable hydrogen bond donor catalysts.
abstract: The strategic incorporation of internal Lewis acids onto urea scaffolds gives rise to a family of tunable hydrogen bond donor catalysts. The nature of the Lewis acid and associated ligands affects the urea polarization, acidity, and activity in reactions of nitrocyclopropane carboxylates and nitrodiazoesters.
authors.affiliation: The Ohio State University, 100 W. 18th Ave., Columbus, OH, USA.
authors.forename: David M
authors.initials: DM
authors.lastname: Nickerson
authors.forename: Veronica V
authors.initials: VV
authors.lastname: Angeles
authors.forename: Tyler J
authors.initials: TJ
authors.lastname: Auvil
authors.forename: Sonia S
authors.initials: SS
authors.lastname: So
authors.forename: Anita E
authors.initials: AE
authors.lastname: Mattson