Redox-Neutral Photocatalytic Cyclopropanation via Radical/Polar Crossover
作者:James P. Phelan、Simon B. Lang、Jordan S. Compton、Christopher B. Kelly、Ryan Dykstra、Osvaldo Gutierrez、Gary A. Molander
DOI:10.1021/jacs.8b05243
日期:2018.6.27
A benchtop stable, bifunctional reagent for the redox-neutral cyclopropanation of olefins has been developed. Triethylammonium bis(catecholato)iodomethylsilicate can be readily prepared on multigram scale. Using this reagent in combination with an organic photocatalyst and visible light, cyclopropanation of an array of olefins, including trifluoromethyl- and pinacolatoboryl-substituted alkenes, can
Metal-free defluorinative arylation of trifluoromethyl alkenes <i>via</i> photoredox catalysis
作者:Rebecca J. Wiles、James P. Phelan、Gary A. Molander
DOI:10.1039/c9cc04265b
日期:——
photoredox-mediated processes are not amenable to aryl radical addition to trifluoromethyl alkenes. A metal-free, functional group-tolerant method for the preparation of benzylic gem-difluoroalkenes is described. Halogen atom abstraction from (hetero)aryl halides generates aryl radicals that undergo a defluorinative arylation of α-trifluoromethyl alkenes, tolerating electronically disparate aryl radicals and α-trifluoromethyl
The present invention relates to compounds of formula (I)
wherein X, R1, R2, R3, R4, R5, m, and n are defined in the specification are TRPV1 antagonists. Compositions comprising such compounds and methods for treating conditions and disorders using such compounds and compositions are also disclosed.
photoredox-catalysed strategy to access gem-difluoroallylarenes from α-trifluoromethylalkenes with stericallyhindered primary amines via C–N and C–F bond activation. This deaminative and defluorinative allylation is generally compatible with diverse functional groups and stericallyhindered α-3° and 2° primary amines.