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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 31, Number 6
BKCSDE 31(6)
June 20, 2010

Title	Enantiomeric Resolution of α-Amino Acid Derivatives on Two Diastereomeric Chiral Stationary Phases Based on Chiral Crown Ethers Incorporating Two Different Chiral Units
Author	Hee Jin Kim, Hee Jung Choi, Yoon Jae Cho, Myung Ho Hyun*
Keywords	Chiral stationary phase, Enantiomeric resolution, Liquid chromatography, α-Amino acid derivatives
Abstract	Two diastereomeric chiral stationary phases (CSPs) were applied to the liquid chromatographic resolution of various racemic α-amino methyl esters, α-amino N,N-diethylamides and α-amino N-propylamides. The CSP incorporating (R)- 3,3’-diphenyl-1,1’-binaphtyl and (R,R)-tartaric acid unit as chiral barriers did not show any chiral recognition. In contrast, the CSP incorporating (R)-3,3’-diphenyl-1,1’-binaphtyl and (S,S)-tartaric acid unit as chiral barriers was found to show excellent chiral recognition especially for the two enantiomers of α-amino N-propylamides. Some of α-amino methyl esters and α-amino N,N-diethylamides were also resolved on the CSP incorporating (R)-3,3’-diphenyl-1,1’- binaphtyl and (S,S)-tartaric acid unit. From these results it was concluded that the two chiral units composing the diastereomeric CSPs can show “matched” or “mismatched” effect on the chiral recognition according to their absolute stereochemistry.
Page	1551 - 1554
Full Text	PDF

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