Alkenylation of C−H Bonds via Reaction with Vinyl and Dienyl Triflones. Stereospecific Synthesis of Trisubstituted Vinyl Triflones via Organocopper Addition to Acetylenic Triflones1
Cu Photoredox Catalysts Supported by a 4,6-Disubstituted 2,2′-Bipyridine Ligand: Application in Chlorotrifluoromethylation of Alkenes
作者:Murat Alkan-Zambada、Xile Hu
DOI:10.1021/acs.organomet.8b00585
日期:2018.11.12
exhibit longer excited state lifetimes and higher Cu(I)/Cu(II) potentials compared to the most widely used Cucatalyst, [Cu(dap)2]Cl. The complex with Xantphos as the P^P ligand is an efficientcatalyst for chlorotrifluoromethylation of terminal alkenes, especially styrenes, which had been challenging substrates for previously reported photoredoxreactions. This chlorotrifluoromethylation method enables
A mild and convenient synthesis of functionalized methyl triflones and vinyl triflones
作者:Anu Mahadevan、P.L. Fuchs
DOI:10.1016/0040-4039(94)88065-4
日期:1994.8
A general route for the synthesis of methyl triflone derivatives utilizing triflic anhydride is described. Stereoselective synthesis of E-vinyl and dienyl triflones has been accomplished by the Peterson olefination reaction of α-silyl triflone anions.
Site-Selective Remote Radical C−H Functionalization of Unactivated C−H Bonds in Amides Using Sulfone Reagents
作者:Yong Xia、Lin Wang、Armido Studer
DOI:10.1002/anie.201807455
日期:2018.9.24
A general and practical strategy for remote site‐selective functionalization of unactivated aliphatic C−H bonds in various amides by radical chemistry is introduced. C−H bond functionalization is achieved by using the readily installed N‐allylsulfonyl moiety as an N‐radical precursor. The in situ generated N‐radical engages in intramolecular 1,5‐hydrogen atom transfer to generate a translocated C radical