Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research
Date (from‐to) : 2015/04 -2017/03
Author : Yamada Hidetosh; IKEUCHI Kazutada
In order to increase the efficiency of the glycosylation reaction by flexibilizing the conformation of the pyranose ring, we investigated flexibility and reactivity of glucose derivatives equipped with bridging groups between the 3- and 6-oxygens. As a result, we revealed that the use of bibenzyl-bismethylene group as the bridging group increased flexibility of the conformation of glucopyranose ring and that reactivity of the bridged glycosyl donor improved comparing to that without the bridge. In addition, we developed a highly alfa-selective glycosylation reaction using the bridged glycosyl donor. Previously, the conformation of the glycosyl donors used in the chemical glycosylation reactions have been locked; therefore, our approach is an innovative trial. Further, utilizing the alfa-selective glycosylation, we expanded our work to the synthesis of several cyclic 1,4-oligo glucosides.