Chemical Modification of Hyaluronic Acid for Intraoral Application
作者:Flavia Laffleur、Julia Röggla、Muneeb Ahmad Idrees、Julia Griessinger
DOI:10.1002/jps.24060
日期:2014.8
was aimed to investigate chemical preactivated thiomers for their potential use in mucosal drug delivery. Thiomers--thiolated polymers--are mucoadhesive polymers with sulfhydryl group-bearing side chains. Thiomers are synthesized by covalent attachment of low molecular mass compounds bearing sulfhydryl group to the polymeric backbone of well-established polymers. Hyaluronic acid-cysteine ethyl este
Mechanistic and synthetic aspects of macrolide ring closure
作者:R.H. Wollenberg、J.S. Nimitz、D.Y. Gokcek
DOI:10.1016/s0040-4039(00)78608-4
日期:1980.1
“double-activation” mechanism for macrolide ring closure from relatively electron-rich 2-pyridyl thiolesters while a change of mechanism is observed for electron-poor 2-pyridyl thiolesters. Mechanistic and syntheticaspects of the ion-assisted cyclization are also discussed.