Synthesis of New Lipophilic Phosphonate and Phosphonamidate Analogues of N-Acetylmuramyl-L-alanyl-D-isoglutamine Related to LK 423
作者:Stanislav Gobec、Uroš Urleb
DOI:10.3390/70400394
日期:——
A syntheses of three new muramyl dipeptide (MDP) analogues related to LK 423 as potential immunomodulators are presented. The dipeptide part of the lead compound was modified by introducing a phosphonamide isostere instead of the amide bond between Lalanine and D-glutamic acid (or D-isoglutamine), yielding new MDP analogues 5 and 9. Furthermore, the amide bond between L-Ala and D-Glu was replaced by a phosphonate isostere, giving peptidyl phosphonate 14. The scope and limitations of the synthetic strategies employed are discussed.
A One-Pot Conversion of α-Aminoalkylphosphonous Acids into Monomethyl α-Aminoalkylphosphonates
作者:Stanislav Gobec、Katja Štrancar
DOI:10.1055/s-2004-815922
日期:——
An excellent method for a one-pot conversion of N-protected α-aminoalkylphosphonous acids into the corresponding monomethyl phosphonates, using thionyl chloride in methanol, has been devised. N-Protected monomethyl α-aminoalkylphosphonates are valuable intermediates in the preparation of phosphapeptides.