A highly regioselective synthesis of valuable gem-difluorinated C-furanosides from unprotected aldoses via a debenzylative cycloetherification (DBCE) reaction induced by diethylaminosulfur trifluoride is descibed. The scope and limitations of this DBCE reaction are described using a series of commercially available pentoses and hexoses to afford, without selective protection/deprotection sequences
本文描述了由未保护的醛糖通过由三
氟乙二
氨基
氨基
硫醚诱导的
脱苄基环醚化(DBCE)反应高度区域选择性地合成有价值的宝石-二
氟化C-
呋喃糖苷的方法。使用一系列可商购的戊糖和己糖描述了该DBCE反应的范围和局限性,以在没有选择性保护/
脱保护序列的情况下以中等至良好的产率提供了相应的宝石-二
氟化C-
呋喃糖苷。