Novel Immunomodulator FTY720 Is Phosphorylated in Rats and Humans To Form a Single Stereoisomer. Identification, Chemical Proof, and Biological Characterization of the Biologically Active Species and Its Enantiomer
作者:Rainer Albert、Klaus Hinterding、Volker Brinkmann、Danilo Guerini、Constanze Müller-Hartwieg、Helmut Knecht、Corinne Simeon、Markus Streiff、Trixie Wagner、Karl Welzenbach、Frédéric Zécri、Markus Zollinger、Nigel Cooke、Eric Francotte
DOI:10.1021/jm050242f
日期:2005.8.1
In vivo phosphorylation. of FTY720 (1) in rats and humans resulted exclusively in the biologically active (S)-configured enantiomer, which was proven by an ex vivo o-phthaldialdehyde derivatization protocol especially elaborated for phosphates of 1. Starting from the prochiral amino alcohol 1, racemic and enantiomerically pure phosphates of 1 were synthesized. Pure enantiomers were obtained after purification of a partially protected key intermediate on an enantioselective support. The absolute stereochemistry was determined by X-ray diffraction.