Patent ID: 8268631

Claim:
A chiral selector for a chromatographic separation, comprising: an α-unsubstituted β-amino acid derivative of the structure (I): wherein n is an integer of 1-5, R 1 is (C 6 -C 10 )-aryl, (C 7 -C 13 )-aralkyl, (C 7 -C 10 )-heteroaralkyl, or pyridyl, X is OH, R 2 is CH 2 CHR 3 R 4 , wherein R 3 is H or OH, R 4 is (C 1 -C 20 )-alkyl, (C 6 -C 10 )-aryl or (C 7 -C 13 )-aralkyl, and the chiral selector is present in predominantly one absolute configuration with respect to the C-3 carbon atom (β-carbon atom).