title: Aminolysis of Y-substituted phenyl X-substituted benzoates with piperidine: effect of nonleaving group substituent.
abstract: The title reaction has been suggested to proceed through a zwitterionic tetrahedral intermediate with a change in the rate determining step on the basis of the curved Brønsted-type plots obtained. The curvature center of the curved Brønsted-type plots is at pKa = 6.4 regardless of the electronic nature of the substituent X in the benzoyl moiety.
authors.affiliation: Department of Chemistry, Ewha Womans University, Seoul 120-750, Korea. ihum@ewha.ac.kr
authors.forename: Ik-Hwan
authors.initials: IH
authors.lastname: Um
authors.forename: Ji-Youn
authors.initials: JY
authors.lastname: Lee
authors.forename: Seung-Hak
authors.initials: SH
authors.lastname: Ko
authors.forename: Sun-Kun
authors.initials: SK
authors.lastname: Bae