Direct Resolution of Optically Active Isomers on Chiral Packings Containing Ergoline Skeletons. 5. Enantioseparation of Amino Acid Derivatives
作者:A. Messina、A. M. Girelli、M. Flieger、M. Sinibaldi、P. Sedmera、L. Cvak
DOI:10.1021/ac950698c
日期:1996.4.1
alkaloid-based chiral stationary phase preparation is described. Synthesis is based on bonding the allyl derivative of terguride to mercaptopropylsilanized silica gel. The packing exhibits higher content of chiral selector, stability, reproducibility, and enantioselectivity toward amino acids compared to that previously studied. The chromatographic behavior of amino acids with different side chains and substituent
Continuous Separation of Racemic 3,5-Dinitrobenzoyl-Amino Acids in a Centrifugal Contact Separator with the Aid of Cinchona-Based Chiral Host Compounds
作者:Andrew J. Hallett、Gerard J. Kwant、Johannes G. de Vries
DOI:10.1002/chem.200800797
日期:2009.2.16
Resolution through revolution: It is possible to extract 3,5‐dinitrobenzoyl‐protected amino acids enantioselectively with the aid of a table‐top centrifugalcontactseparator and a catalytic amount of a chiral host compound based on the Cinchona alkaloids. Enantioselectivities of up to 80 % could be reached in a single pass. This allows the development of a process for the continuous separation of
Enantioselective Hydrolysis of N-Acylated α-Amino Esters at a Biphasic Interface: Tandem Reaction Kinetic Resolution Using a Chiral Complexing Agent
作者:Seth E. Snyder、William H. Pirkle
DOI:10.1021/ol026517s
日期:2002.9.1
Highly enantioselective hydrolytic kinetic resolutions of esters derived from N-acylated alpha-amino acids proceed rapidly at hydorcarbon/water interfaces in the presence of a proline-derived chiral selector. When performed in tandem with an enantioselective biphasic esterification reaction, esters of 100% enantiomeric excess are obtained.