Arenesulfonyl Fluoride Synthesis via Copper-Catalyzed Fluorosulfonylation of Arenediazonium Salts
作者:Yongan Liu、Donghai Yu、Yong Guo、Ji-Chang Xiao、Qing-Yun Chen、Chao Liu
DOI:10.1021/acs.orglett.0c00484
日期:2020.3.20
We report herein a general and practical copper-catalyzed fluorosulfonylation reaction of a wide range of abundant arenediazonium salts to smoothly prepare various arenesulfonylfluorides using the 1,4-diazabicyclo[2.2.2]octane-bis(sulfur dioxide) adduct as a convenient sulfonyl source in combination with KHF2 as an ideal fluorine source and without the need for additional oxidants. Interestingly,
Hypervalent Iodine(III)-Catalyzed Balz-Schiemann Fluorination under Mild Conditions
作者:Bo Xing、Chuanfa Ni、Jinbo Hu
DOI:10.1002/anie.201802466
日期:2018.7.26
An unprecedented hypervalentiodine(III) catalyzed Balz–Schiemann reaction is described. In the presence of a hypervalentiodine compound, the fluorination reaction proceeds under mild conditions (25–60 °C), and features a wide substrate scope and good functional‐group compatibility.
Enantioselective Arylcyanation of Styrenes
<i>via</i>
<scp>Copper‐Catalyzed</scp>
Radical Relay
<sup>†</sup>
作者:Weiwen Zhuang、Pinhong Chen、Guosheng Liu
DOI:10.1002/cjoc.202000494
日期:2021.1
The first copper‐catalyzedenantioselective arylcyanation of styrenes has been developed using readily available anilines as aryl radical precursors under mild conditions, which enables easy access to chiral 2,3‐diaryl propionitriles with moderate to good enantioselectivities. This operationally straightforward reaction exhibits broad substrate scope and functional group tolerance. Notably, this method
enables the expedient construction of a host of β-fluoroalkyl-containing cinnamate derivatives. The reaction proceeds through visible-light-promoted gold redox catalysis, occurs smoothly under very mild reaction conditions, accommodates a large variety of functional groups, and more importantly allows the incorporation of fluorine and aryl groups with excellent regio- and stereoselectivity. The concomitant
Rapid Access to <i>N</i>-Protected Sulfonimidoyl Fluorides: Divergent Synthesis of Sulfonamides and Sulfonimidamides
作者:Yongan Liu、Qijun Pan、Xiaojun Hu、Yong Guo、Qing-Yun Chen、Chao Liu
DOI:10.1021/acs.orglett.1c01118
日期:2021.5.21
N-protected sulfonimidoyl fluorides. This operationally simple protocol tolerates a wide range of functional groups and can be applied to the late-stagemodification of complex bioactive molecules. Furthermore, pharmaceutically important primary sulfonamides and sulfonimidamides derived from these valuable N-protected sulfonimidoyl fluoride units were prepared in minimal synthetic steps.