title: Xanthene-4,5-diamine derivatives: a study of anion-binding catalysis.
abstract: This study describes the synthesis of a class of anion-binding catalysts based on a xanthene scaffold. Both unsymmetrical catalysts andC2-symmetrical catalysts were generated, and were examined in the cyclization of 3- and 2-substituted furans ontoN-acyliminium ions. Good conversion for each reaction was observed with a variety of anion-binding catalysts (42-76%).
authors: Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, PA 19104, United States.
authors: Alison E
authors: AE
authors: Metz
authors: Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, PA 19104, United States.
authors: Kailasham
authors: K
authors: Ramalingam
authors: Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, PA 19104, United States.
authors: Marisa C
authors: MC
authors: Kozlowski
keywords: N-acyliminium ions; anion-binding catalyst; asymmetric organocatalysis; furan cyclization; xanthene-4,5-diamine