Prodrugs of HIV protease inhibitors—saquinavir, indinavir and nelfinavir—derived from diglycerides or amino acids: synthesis, stability and anti-HIV activity
crucial for antiviral activity. The Leu- and Phe-PI prodrugs released the active free drug very rapidly (half-lives of hydrolysis in buffer at 37 degree C of 3-4 h). The Tyr-PI conjugates with a -C(O)(CH(2))(4)- linker exhibited half-lives in the 40-70 h range and antiviral activities in the 21-325 nM range (from 2 to 22 nM for the free PIs). The chemically very stable carbamate "peptidomimetic" Tyr-PI
Phenytoin-Lipid Conjugates as Potential Prodrugs of Phenytoin
作者:Gerhard K. E. Scriba
DOI:10.1002/ardp.19933260810
日期:——
Phenytoin‐1‐triglycerides and phenytoin‐2‐triglycerides were synthesized as potentialprodrugs of phenytoin by covalent binding of 3‐hydroxymethylphenytoin by succinic acid to the positions 1 and 2 of diglycerides, respectively. The corresponding 1‐ and 2‐monoglycerides were prepared. In addition, replacement of glycerol by 3‐hydroxy‐2‐hydroxymethylpropionic acid furnished lipids that allowed direct
Various new nucleosides bearing one or two lipophilic groups at the 2′-position have been synthesized. The lipophilic substituents were attached to a 2′-hydroxy, 2′-amino, or 2′-thio function. These lipophilic nucleosidesanchor in large unilamellar POPC vesicles serving as phospholipidmembrane models. The insertion of these molecules into the membranes was investigated by NMR techniques. For comparison