作者:Guoxi Xu、Kevin D. Moeller
DOI:10.1021/ol100800u
日期:2010.6.4
convenient, two-step procedure has been developed for converting sugar derivatives into C-glycosides containing a masked aldehyde functional group. The chemistry takes advantage of an anodic coupling reaction between an electron-rich olefin and an alcohol. The sequence works for the formation of both furanose and pyranose derivatives if less polarized vinyl sulfide derived radical cation intermediates are
已经开发了一种方便的两步程序,用于将糖衍生物转化为含有被掩盖的醛官能团的C-糖苷。该化学方法利用了富电子烯烃与醇之间的阳极偶联反应。如果使用极化度较低的乙烯基硫醚衍生的自由基阳离子中间体,则该序列可同时形成呋喃糖和吡喃糖衍生物。使用更多极化的烯醇醚衍生的自由基阳离子,环化最适合形成呋喃糖衍生物,其中五元环的形成速率阻止了自由基阳离子引发的消除反应。