Aryl Fluoroalkyl Sulfoxides: Optical Stability and p
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K
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Measurement
作者:Amélia Messara、Nicolas Vanthuyne、Patrick Diter、Mourad Elhabiri、Armen Panossian、Gilles Hanquet、Emmanuel Magnier、Frédéric R. Leroux
DOI:10.1002/ejoc.202100816
日期:2021.9.24
properties of chiral aryl fluoroalkyl sulfoxides with strong synthetic potential were studied. After resolution by enantioselective chromatography, their optical stability was investigated by thermal enantiomerization via enantioselective chromatography. Their ΔG values range from 38.2 to 41.0 kcal mol−1 at 214 °C. In addition, the pKa values of six aryl difluoromethyl sulfoxides were determined via
研究了具有强大合成潜力的手性芳基氟代烷基亚砜的关键性质。通过对映选择性色谱拆分后,通过对映选择性色谱的热对映异构化来研究它们的光学稳定性。它们的 Δ G值在 214 °C 时为 38.2 至 41.0 kcal mol -1。此外,六种芳基二氟甲基亚砜的 p K a值是通过 DMSO 中的间接紫外-可见分光光度滴定法测定的,其范围为 20.3-22.5。
Trifluoromethylation of thiophenols and thiols with sodium trifluoromethanesulfinate and iodine pentoxide
作者:Jing-Jing Ma、Wen-Bin Yi、Guo-Ping Lu、Chun Cai
DOI:10.1039/c5cy01561h
日期:——
facile trifluoromethylation process for a wide range of thiophenols and thiols under metal free conditions has been developed using two simple and safe solids, sodium trifluoro-methanesulfinate and iodinepentoxide, via the radical process.
An efficient method for trifluoromethylthiolation of arenediazonium salts has been developed in mild conditions with a stable and convenient AgSCF3. It provides a straightforward and convenient way for the synthesis of trifluoromethylthiolated compound from diazonium salts in moderate to good yields.
Trifluoromethyl Sulfoxides: Reagents for Metal‐Free C−H Trifluoromethylthiolation
作者:Dong Wang、C. Grace Carlton、Masanori Tayu、Joseph J. W. McDouall、Gregory J. P. Perry、David J. Procter
DOI:10.1002/anie.202005531
日期:2020.9.7
class of trifluoromethylthiolating reagent. The sulfoxides engage in metal‐free C−H trifluoromethylthiolation with a range of (hetero)arenes. The method is also applicable to the functionalization of important compound classes, such as ligand derivatives and polyaromatics, and in the late‐stage trifluoromethylthiolation of medicines and agrochemicals. The isolation and characterization of a sulfonium
A highly efficient Rh-catalyzed carbenoid addition to trifluoromethylthioether for the formation of trifluoromethyl-substituted sulfonium ylide is described. The trifluoromethyl-substituted sulfonium ylide can act as an electrophilic trifluoromethylation reagent, as demonstrated by trifluoromethylation of β-ketoesters and aryl iodides.