A nanostarch functionalized ionic liquid containing imidazolium cation and cobalt chelate anion for the synthesis of carbamates from amines and dimethyl carbonate
作者:Subodh Kumar、Suman L. Jain
DOI:10.1039/c3dt52127c
日期:——
A new nanostarch functionalized ionic liquid containing imidazolium cation and cobalt chelate anion was synthesized and tested for the one pot synthesis of carbamates by the reaction of amines and dimethyl carbonate (DMC), affording excellent yield of the products under solvent free mild reaction conditions. The synthesized ionic liquid was easily recovered and reused several times without any loss
The synthetic utility of quinone imine ketals in the context of asymmetriccatalysis was disclosed for the first time. By expanding the utility of chiral Brønsted acid catalysis to the electrophilic activation of quinone imine ketals, we succeeded in the development of highly enantioselective arylation of encarbamates to give α-amino-β-aryl ethers wherein quinone imine ketals act as functionalized aromatic