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Novel cinchona alkaloid carbamate C9-dimers as chiral anion-exchange type selectors for high-performance liquid chromatography.
Nine new quinine (QN) carbamate C9-dimers (QN-X-QN), with different aliphatic and cyclic spacers (X), have been synthesized and immobilized onto porous silica gel for HPLC. The chiral discriminatingExpand
Evaluation of the contribution to enantioselectivity of quinine and quinidine scaffolds in chemically and physically mixed chiral selectors.
Three "dimeric" C(9)-carbamates of quinine (QN) and quinidine (QD), that is, QN-QN, QD-QD, and QN-QD (chemically prepared mixture of the two cinchona-derived subunits), separated by an ethyleneExpand
Novel cinchona alkaloid O9-hydrazide derivatives as chiral anion-exchange-type selectors: Synthesis and chromatographic evaluation
SummarySix new quinine (QN) O9-hydrazide derivatives with different substituents have been synthesized and immobilized on porous silica gel for HPLC. The chiral resolving power of theseExpand