Spiroketals of monosaccharides by dye-sensitized photooxygenation of furyl ketoses
作者:Flavio Cermola、Rosalia Sferruzza、Maria Rosaria Iesce
DOI:10.1016/j.tetlet.2013.12.009
日期:2014.1
[4+2] Cycloaddition of singlet oxygen to suitably substituted furans followed by reduction of the corresponding endoperoxides afforded functionalized enediones which quickly cyclized into the titled spiroketals. The reported method represents a green synthetic one-pot procedure for novel [6,6]-, [5,6]-, and [5,5]-spiroketals of sugars.
[4 + 2]单线态氧与适当取代的呋喃的环加成反应,然后还原相应的内过氧化物,得到官能化的乙二酮,其可快速环化为标题的螺酮。报道的方法代表了一种新型的[6,6]-,[5,6]-和[5,5]-螺旋糖类的绿色合成一锅法。