α,α-Alkylation-Halogenation and Dihalogenation of Sulfoxonium Ylides. A Direct Preparation of Geminal Difunctionalized Ketones
作者:Rafael D. C. Gallo、Anees Ahmad、Gustavo Metzker、Antonio C. B. Burtoloso
DOI:10.1002/chem.201704609
日期:2017.12.1
A one‐pot alkylation–halogenation of ketosulfoxonium ylides in the presence of alkyl halides is described. The method furnishes several gem‐difunctionalized haloketones (an alkyl and F, Cl, Br, or I) in good yields. Replacing alkyl halides with a mixture of electrophilic halogen species and various halide anions led to gem‐dihalogenated ketones containing a combination of the same or two different
描述了在存在烷基卤化物的情况下一酮醚化ox酮的一锅烷基化-卤化反应。该方法以良好的收率提供了几种宝石双官能化的卤代酮(烷基和F,Cl,Br或I)。用亲电子卤素物质和各种卤化物阴离子的混合物代替烷基卤化物,会导致宝石二卤代酮含有相同或两种不同卤素的组合。动力学同位素效应以及反应动力学实验使人们洞悉了这些反应的机理。