作者:William B. Motherwell、Michael F. Greaney、Derek A. Tocher
DOI:10.1039/b209079a
日期:——
Treatment of α-phenylsulfanyl esters 11â14 with one equivalent of difluoroiodotoluene 3a produced the α-fluoro sulfides 17â20 in good overall yield through a Fluoro-Pummerer reaction. A second equivalent of reagent produced α,α-difluoro sulfides and a third led to α,α-difluoro sulfoxides. An identical pattern of reactivity was observed with the α-phenylsulfanyl lactone 26. This sequential fluorinationâoxidation behaviour was exploited in the one-pot synthesis of 3-fluoro-2(5H)-furanone 33 starting from α-phenylsulfanylbutyrolactone 32.
α-苯硫基酯11-14与一当量的二氟碘甲苯3a通过Fluoro-Pummerer反应,以良好的总产率生成了α-氟硫化合物17-20。再加入一当量的试剂产生了α,α-二氟硫化合物,而第三当量则生成了α,α-二氟亚砜。α-苯硫基内酯26也观察到了相同的反应活性模式。这种顺序氟化-氧化行为在一锅法合成3-氟-2(5H)-呋喃酮33中得到了应用,该合成从α-苯硫基丁内酯32开始。