Allosteric P═O-Based Receptors for Dicarboxylic Acids
摘要:
The synthesis of new P=O-disubstituted receptors with appended crown ethers and their properties as receptors for dicarboxylic acids have been studied. High affinities have been observed (oxalic and malonic acids with 4-, 5-, 6-, or 8-crown ethers). Binding of a cationic effector within the crown ether unit resulted in a positive "allostere" effect, which has been determined to be K-rol = 7 in the best case (binding of malonic acid with Li+ @ rao-3b).
efficient preparation of a set of enantiopure bisphosphine ligands, whose backbone incorporates an array of diverse crown ethers as distalregulation sites via well-defined supramolecular interactions to tune the catalytic properties of the bisphosphine groups. These new ligands enabled very good catalytic activity in rhodium-mediatedasymmetric hydrogenations at low catalyst loadings, while the enantioselectivity
Allosteric P═O-Based Receptors for Dicarboxylic Acids
作者:D. Amilan Jose、Ignasi Mon、Héctor Fernández-Pérez、Eduardo C. Escudero-Adán、J. Benet-Buchholz、Anton Vidal-Ferran
DOI:10.1021/ol201277d
日期:2011.7.15
The synthesis of new P=O-disubstituted receptors with appended crown ethers and their properties as receptors for dicarboxylic acids have been studied. High affinities have been observed (oxalic and malonic acids with 4-, 5-, 6-, or 8-crown ethers). Binding of a cationic effector within the crown ether unit resulted in a positive "allostere" effect, which has been determined to be K-rol = 7 in the best case (binding of malonic acid with Li+ @ rao-3b).