Scalable Approach to Fluorinated Heterocycles with Sulfur Tetrafluoride (SF<sub>4</sub>)
作者:Serhii Trofymchuk、Maksym Bugera、Anton A. Klipkov、Volodymyr Ahunovych、Bohdan Razhyk、Sergey Semenov、Andrii Boretskyi、Karen Tarasenko、Pavel K. Mykhailiuk
DOI:10.1021/acs.joc.1c01518
日期:2021.9.3
A general approach to fluorinated (hetero)aromatic derivatives is elaborated. The key reaction is a deoxofluorination of substituted acetophenones with sulfur tetrafluoride (SF4). In contrast to previous deoxofluorination methods, this transformation is fast, scalable (up to 70 g), and high-yielding. More than 100 novel or previously hardly accessible fluorinated heterocycles, interesting for medicinal
Oxidation of α-trifluoromethyl and non-fluorinated alcohols<i>via</i>the merger of oxoammonium cations and photoredox catalysis
作者:Vincent A. Pistritto、Joshua M. Paolillo、Kathryn A. Bisset、Nicholas E. Leadbeater
DOI:10.1039/c8ob01063c
日期:——
present an alcoholoxidation strategy to access α-trifluoromethyl ketones (TFMKs) merging catalytic oxoammonium cation oxidation with visible-light photoredox catalysis. This work uses 4-acetamido-(2,2,6,6-tetramethyl-piperidin-1-yl)oxyl as an organic oxidant capable of generating TFMKs in good yields. The methodology serves as an improvement over previous reports of an analogous oxidation strategy requiring
作者:Mikhail M. Kremlev、Aleksej I. Mushta、Wieland Tyrra、Dieter Naumann、Hendrik T.M. Fischer、Yurii L. Yagupolskii
DOI:10.1016/j.jfluchem.2007.06.009
日期:2007.11
are formed selectivelyfrom reactions of trifluoromethylsilver and the corresponding carboxylic acid chlorides in moderate to excellent yields. The conditions chosen are dependent on the nature of the acylchloride. Attempts to prepare alkyl(trifluoromethyl)ketones yielded product mixtures of the corresponding acyl fluorides, trifluoromethyl-, pentafluoroethyl- and n-heptafluoropropyl ketones.