Fluorination of olefins with PhSeF3, PhSeF5 and PhTeF5
作者:Sergei A. Lermontov、Sergei I. Zavorin、Ilya V. Bakhtin、Alexei N. Pushin、Nikolai S. Zefirov、Peter J. Stang
DOI:10.1016/s0022-1139(97)00121-8
日期:1998.1
Phenyselenium trifluoride, PhSeF3 (PSTF) either oxidatively difluorinates or selenofluorinates olefins, depending on their structures. The pentafluorides PhSeF5 and PhTeF5 appear to be effective difluorinating reagents, affording 1,2-difluoroalkanes from olefins.
Application of silicon tetrafluoride to fluorinations with xenondifluoride as a catalyst is investigated. It was found that vic-difluorination of phenyl alkenes and transformation of benzaldehydes to difluoromethoxybenzenes using xenondifluoride are enhanced by silicon tetrafluoride.
A novel method for preparation of vicinal fluoro-iodo compounds using elemental fluorine
作者:Shlomo Rozen、Michael Brand
DOI:10.1016/s0040-4039(00)74546-1
日期:1980.1
Elemental fluorine reacts with iodine at −75° and the resulting IF is reacted, without any isolation or purification, with olefins thus producing fluoro-iodo compounds in an excellent regio- and stereospecific mode.
A Clean and Selective Radical Homocoupling Employing Carboxylic Acids with Titania Photoredox Catalysis
作者:David W. Manley、John C. Walton
DOI:10.1021/ol502625w
日期:2014.10.17
A titania photoredox catalysis protocol was developed for the homocoupling of C-centered radicals derived from carboxylicacids. Intermolecular reactions were generally efficient and selective, furnishing the desired dimers in good yields under mild neutral conditions. Selective cross-coupling with two acids proved unsuccessful. An intramolecular adaptation enabled macrocycles to be prepared, albeit
Hexafluoropropene oxide (HFPO) is shown to be a good reagent for the nucleophilic formation of the element–fluorine bond in organoelement compounds. Fluorides of Bi, Sb, Se, Te and I were prepared from appropriate oxygen compounds