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
摘要:
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.
Compounds of formula (I): wherein R1, R2, n and m are as defined in the specification, processes for their production, their uses and pharmaceutical compositions containing them.
Compounds of formula I:
wherein R
1
, R
2
, n and m are as defined in the specification, processes for their production, their uses and pharmaceutical compositions containing them.
Compounds of formula I:
wherein R
1
, R
2
, n and m are as defined in the specification, processes for their production, their uses and pharmaceutical compositions containing them.