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■ Active Receptors in the Nucleophilic Addition of Pyrrolidine to Acrylamide

Mercedes Crego, César Raposo, M^a Luisa Mussons, Amanda Berrocal, M^a Cruz Caballero, and Joaquín R. Morán

*Departamento de Química Orgánica, Universidad de Salamanca, Plaza de los Caídos, 37008 Salamanca, Spain

Abstract

Three amide receptors which show significant catalytic activity in the nucleophilic addition of pyrrolidine to acrylamide have been prepared. Additional hydrogen bonds and charge-transfer in the transition state are invoked to explain the catalytic effect.