2016
Cortes-Hernandez Mayra, Rojas-Lima Susana, Hernandez-Rodríguez Marcos, Cruz-Borbolla Julian, López-Ruiz Heraclio, Preferred Binding of Carboxylates by Chiral Urea Derivatives Containing -Phenylethyl Group, HELVETICA CHIMICA ACTA, 2016, 99, 416-424DOI: 10.1002/hlca.201500177
Abstract
An efficient, simple protocol for the synthesis of a new family of chiral ureas 1 - 4 is described. The binding properties of 1 - 4 toward different anion (acetate, benzoate, fluoride, and chloride) have been studied by H-1-NMR titration and have been observed in the case of 4 is a selective receptor for acetate. The theoretical calculation M06/6-311+G(d,p) helped us explain the binding properties observed. The most interesting observation is that this calculated structure is consistent with expected, based on the concept of allylic 1,3-strain (A(1,3) strain). When chiral caboxylates were studied, urea 1 was the best in discriminating between enantiomers
Furocoumarins of three species of the genus Dorstenia
Synthesis and Structures of some Lithium and Sodium (Aminoalcoholato)hydrido Aluminates
Diastereoselective alkylation of chiral glycinate derivatives containing the ?-phenylethyl group.