Synthesis of vinylic C-glycosides from telluroglycosides. Addition of photochemically and thermally generated glycosyl radicals to alkynes
作者:Shigeru Yamago、Hiroshi Miyazoe、Jun-ichi Yoshida
DOI:10.1016/s0040-4039(99)00182-3
日期:1999.3
Glycosyl radicalsgeneratedfrom telluroglycosides react with a variety of alkynes to give the corresponding vinylic C-glycosides in good to excellent yields. The reaction takes place in an atom transfer manner to form vinyl telluride, and the resulting CTe bond is transmetalated to the CZn bond with Et2Zn or reduced to the CH bond with tributyltin hydride.