possessing a NH functionality at C-1 position as monodentate hydrogen bond donor were developed and evaluated for enantioselective organocatalytic alcoholysis of meso-cyclic anhydrides. These structural diversified organocatalysts were found to induce high enantioselectivity in alcoholysis of anhydrides and was successfully applied to the asymmetric synthesis of (S)-GABOB.
The immobilisation of chiral organocatalysts on magnetic nanoparticles: the support particle cannot always be considered inert
作者:Oliver Gleeson、Gemma-Louise Davies、Aldo Peschiulli、Renata Tekoriute、Yurii K. Gun'ko、Stephen J. Connon
DOI:10.1039/c1ob06110k
日期:——
catalysis by the nanoparticles in the absence of the organocatalyst was detected, which explains in part the poor performance of the immobilised organocatalysts in these reactions from a stereoselectivity standpoint. It seems clear that the immobilisation of sensitive chiral organocatalysts onto magnetite nanoparticles does not always result in heterogeneous catalysts with acceptable activity and selectivity