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Internal Lewis acid assisted ureas: tunable hydrogen bond donor catalysts.

Chemical communications (Cambridge, England) (2012-12-01)
David M Nickerson, Veronica V Angeles, Tyler J Auvil, Sonia S So, Anita E Mattson
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.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Potassium 3-ethoxycarbonylbenzoyltrifluoroborate
Sigma-Aldrich
Mattson Boronate Urea Pinacol Ester

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