Patent ID: 8647882

Claim:
A stationary phase for chromatographic separation, comprising a support material, and a chiral selector covalently attached to the support material; wherein the support material comprises silica gel or a monolith, and the chiral selector comprises: an α-unsubstituted β-amino acid derivative of 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, pyridyl, X is a linking group covalently attached to the support material, R 2 is 3,5-dinitrobenzoyl or naphthyl, and the chiral selector is present in predominantly one absolute configuration with respect to the C-3 carbon atom (β-carbon atom).