Oxyarylation and Aminoarylation of Styrenes Using Photoredox Catalysis
作者:Gabriele Fumagalli、Scott Boyd、Michael F. Greaney
DOI:10.1021/ol401940c
日期:2013.9.6
A three-component coupling of styrenes is reported, using photoredoxcatalysis to achieve simultaneous arylation and C–O or C–N bond formation across the styrene double bond.
Olefin Bifunctionalization: A Visible-light Photoredox-catalyzed Aryl Alkoxylation of Olefins
作者:Eiji Yamaguchi、Wakako Tanaka、Akichika Itoh
DOI:10.1002/asia.201801211
日期:2019.1.4
Olefin bifunctionalization is a facile route to obtain complex molecules from abundant and commercially available olefin feedstocks. Visible light together with a catalytic amount of tris(bipyridine)ruthenium salt catalyzes the aryl alkoxylation of styrenes with aryl diazonium salts in alcohol solvents via a photoredox process. The scope of this proposed reaction with respect to various aryl diazonium
Photoredox-Catalyzed Intermolecular Radical Arylthiocyanation/Arylselenocyanation of Alkenes: Access to Aryl-Substituted Alkylthiocyanates/Alkylselenocyanates
作者:Injamam Ul Hoque、Soumyadeep Roy Chowdhury、Soumitra Maity
DOI:10.1021/acs.joc.8b03155
日期:2019.3.15
An efficient and highly selective approach for intermolecular arylthiocyanation/arylselenocyanation of alkenes has been reported under mild conditions. Using diazonium salts as the arylating agent and ammonium thiocyanate as the thiocyanate source, chemoselective difunctionalization of alkenes has been done under irradiation of visible light. Both styrenes and acrylates work well to deliver various aryl-substituted alkylthiocyanates in good to excellent yields. In addition, hitherto unknown beta-aryl alkylselenocyanates were also synthesized using the developed protocol with potassium selenocyanate.
Electrophilic Substitution at Saturated Carbon. XXVIII. The Stereochemical Capabilities of Vinyl Anions<sup>1</sup>
作者:D. H. Hunter、Donald J. Cram
DOI:10.1021/ja00976a018
日期:1966.12
Transition-Metal-Free Catalytic Carboalkoxylation of Styrenes at Room Temperature
作者:R. Govindarajan、Jasimuddin Ahmed、Asim Kumar Swain、Swadhin K. Mandal
DOI:10.1021/acs.joc.9b01744
日期:2019.11.1
Herein, we describe the first transition-metal-free catalytic carboalkoxylation of styrenes with aryl diazonium salts by Meerwein addition in the presence of a phenalenyl ligand at room temperature without requiring any light stimulation. This three-component reaction allows facile difunctionalization of styrene derivatives with various alcohols (such as 1, 2, and 3 degrees) as the source of alkoxy group during this transformation. The key intermediates and the transition states involved in this reaction path were unraveled by a series of control experiments coupled with density functional theory calculations. The full mechanistic investigation provides an understanding of the selectivity toward carboalkoxylation Meerwein arylation addition elimination) in the presence of various alcohols over the simple arylation to multiple bond (Meerwein arylation-elimination) reaction.