Mild stereoselective syntheses of thioglycosides under PTC conditions and their use as active and latent glycosyl donors
作者:Suoding Cao、Serge J. Meunier、Fredrik O. Andersson、Marie Letellier、René Roy
DOI:10.1016/s0957-4166(00)86308-9
日期:1994.11
Mild and stereoselective arylthio glycoside syntheses were accomplished by inversion of configuration of glycosyl halides under phase transfer catalyzed conditions. Under such conditions, aryl alpha-thiosialosides having electron donating and withdrawing substituents were evaluated as active and latent thioglycosyl donors. A sialyl-alpha-(2-->6)-galactoside was prepared in good yield using the above strategy.
Facile Preparation of Divalent Sialoside Derivatives by Olefin Metathesis Reaction
作者:Zhonghong Gan、René Roy
DOI:10.1016/s0040-4020(00)00034-x
日期:2000.3
Olefin metathesis catalyzed by RuCl2(CHPh)(PCy3)(2) (1) has been used to synthesize homodimers of O- and S-alkenyl alpha-sialoside derivatives. The reactions afforded reasonable to good yields under mild reaction conditions. Trans-geometrical isomers were preferred in all cases. (C) 2000 Elsevier Science Ltd. All rights reserved.