Unexpected formation of oxetanes from a geminal difluorinated δ-lactone
作者:René Csuk、Erik Prell
DOI:10.1016/j.tet.2009.12.010
日期:2010.2
A perbenzylated 3,3-difluorinated hexono-1,5-lactone was prepared in several steps. Reaction of this lactone with MeOH/p-TsOH followed by a treatment with ion-exchange resin led to the formation of an exocyclic oxetane derived vinylether. Similar reaction with ammonia gave the corresponding carboxamido substituted oxetane in good yields.