Reaction of Difluoromethyl Phenyl Selenoxide with Acetic Anhydride. A Route to Difluoro(phenylseleno)methylation of Ethers
摘要:
Difluoromethyl phenyl selenoxide (2) has been prepared and allowed to react with acetic anhydride in the presence of cyclic ethers and sulfides. Difluorophenylselenomethylation occurred smoothly on reacting 2 with Ac2O in refluxing dichloromethane to give omega-[difluoro(phenylseleno)methoxy]alkyl acetates 4 in 34-87% yields. A sequential reaction of Pummerer type rearrangement, difluorocarbene formation, electrophilic addition of the carbene to oxygen of ethers leading to oxonium ylide, and trapping with phenylselenenyl acetate is proposed.
Perfluoroalkyl Selenoxides, Selenones and Selenoximines: General Preparation and Properties
作者:Arnaud de Zordo‐Banliat、Kevin Grollier、Nicolas Vanthuyne、Sébastien Floquet、Thierry Billard、Guillaume Dagousset、Bruce Pégot、Emmanuel Magnier
DOI:10.1002/anie.202300951
日期:2023.3.13
perfluoroalkyl selenoxides, selenones and selenoximines was possible through a selective oxidation of perfluoroalkyl selenoethers. Synthesis of perfluoroalkyl selenoxides was also described via a two-step one-pot reaction from selenocyanates. The perfluoroalkyl selenoximine family was synthesized. The Hansch-Leo parameters of the compounds were determined and some aryl perfluoroalkyl selenoxides were separated