A tyrosine-based (phosphonylmethoxyalkyl)purine or -pyrimidine conjugate is provided. In some embodiments, the conjugate includes tyrosine based amino acid or dipeptide moieties of (S)-9-(3-hydroxy-2-phosphonyl-methoxypropyl)adenine or its cytosine analogue. A method of synthesizing such conjugates based on Boc-protected amino acid or dipeptides is also provided. In addition, a method of isomerizing an (S,S)-diastereoisomer to an (S,R)-diastereoisomer of an amino acid-based or dipeptide-based conjugate by a process including transesterification is provided. A method of inhibiting viral infection and a method of treating viral infection based on (phosphonylmethoxyalkyl)purine or -pyrimidine conjugates is also provided.
Structure of Cyclic Nucleoside Phosphonate Ester Prodrugs: An Inquiry
作者:Ivan S. Krylov、Valeria M. Zakharova、Michaela Serpi、Ralf Haiges、Boris A. Kashemirov、Charles E. McKenna
DOI:10.1021/jo201735f
日期:2012.1.6
The configuration at phosphorus in cyclic (S)-HPMPC (1, cidofovir) and (S)-HPMPA (2) phenyl ester (5 and 6, respectively) diastereomers ((R-p)-5, (R-p)-6, (S-p)-6) was determined by X-ray crystallography and correlated to their H-1 and P-31 NMR spectra in solution. (R-p)-5 and (R-p)-6 have chair conformations with the nucleobase substituent equatorial and the P-OPh axial. Perhaps surprisingly, (S-p)-6 is (a, a) in the crystal and exists largely as an equilibrium of (a, a)/(e, e) conformers in chloroform or acetonitrile.