Fluorous substituent-based enantiomer and diastereomer separation: Orthogonal use of HPLC columns for the synthesis of nonproteinogenic polyfluoro amino acids and peptides

variety of fluorine-containing amino acid and dipeptide precursors bearing different lengths of perfluoroalkyl chains were separated into their enantiorners and diastereomers, respectively, by the orthogonal use of fluorous and chiral HPLC columns. These results show the applicability of fluorous racemic mixture synthesis for various fluorinated chiral products without introducing conventional cleavable fluorous tags. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008).