Free-Radical Bromotrifluoromethylation of Olefin via Single-Electron Oxidation of NaSO<sub>2</sub>CF<sub>3</sub> by NaBrO<sub>3</sub>
作者:Zhong-Quan Liu、Dong Liu
DOI:10.1021/acs.joc.6b02812
日期:2017.2.3
A free-radical bromotrifluoromethylation of olefin by using NaSO2CF3 and NaBrO3 has been achieved. Sodium bromate acts not only as a single-electron oxidant but also as a bromine source. A radical-clock experiment and electron-spin-resonance detection support a radical process.
A silver-initiated free-radical intermolecular hydrophosphinylation of unactivated alkenes
作者:Zejiang Li、Fenghua Fan、Zengyan Zhang、Yingxia Xiao、Dong Liu、Zhong-Quan Liu
DOI:10.1039/c5ra04136h
日期:——
A scalable, operationally easy intermolecular hydrophosphinylation of various unactivated alkenes with H–P(O) compoundsviaan Ag(i)-initiated free radical process was developed. Mechanistic studies suggest that atom transfer processes were involved in this system.
Photoredox Catalysis Mediated Application of Methyl Fluorosulfonyldifluoroacetate as the CF<sub>2</sub>CO<sub>2</sub>R Radical Source
作者:Wei Yu、Xiu-Hua Xu、Feng-Ling Qing
DOI:10.1021/acs.orglett.6b02580
日期:2016.10.7
A new application of trifluoromethylating reagent, methyl fluorosulfonyldifluoroacetate (FO2SCF2CO2Me, Chen’s reagent), as the carbomethoxydifluoromethylating reagent under visible light photoredox conditions is reported. The visible-light-induced reaction of FO2SCF2CO2Me with unactivated alkenes, styrenes, or heteroarenes affords a variety of carbomethoxydifluoromethylated products.
报道了三氟甲基化试剂,氟磺酰基二氟乙酸甲酯(FO 2 SCF 2 CO 2 Me,Chen氏试剂)在可见光光氧化还原条件下作为羧甲氧基二氟甲基化试剂的新应用。FO 2 SCF 2 CO 2 Me与未活化的烯烃,苯乙烯或杂芳烃的可见光诱导反应产生了多种甲氧基二氟甲基化产物。
Iodotrifluoromethylation of Alkenes and Alkynes with Sodium Trifluoromethanesulfinate and Iodine Pentoxide
作者:Zhaojia Hang、Zejiang Li、Zhong-Quan Liu
DOI:10.1021/ol501380e
日期:2014.7.18
A scalable, selective, and operationally easy iodotrifluoromethylation of a wide range of alkenes and alkynes by using two simple and safe solids, sodiumtrifluoromethanesulfinate and iodine pentoxide, in aqueous medium has been developed. Mechanistic studies confirm that free-radical processes are involved in this system since the key radical intermediates such as CF3 and β-CF3 alkyl radicals have