A palladium-catalyzed intermolecular polarity-mismatched addition of unactivated alkyl radicals to unactivated alkenes was developed for the first time. In the two-component dicarbofunctionalization, a variety of primary, secondary, and tertiary unactivated alkyl halides regioselectively reacted with various unactivated olefins. A series of structurally complex heteropolycycles decorated with a quaternary
Anti-Markovnikov Hydroheteroarylation of Unactivated Alkenes with Indoles, Pyrroles, Benzofurans, and Furans Catalyzed by a Nickel–<i>N</i>-Heterocyclic Carbene System
作者:York Schramm、Makoto Takeuchi、Kazuhiko Semba、Yoshiaki Nakao、John F. Hartwig
DOI:10.1021/jacs.5b08039
日期:2015.9.30
benzofurans, and furans, to unactivated terminal and internal alkenes. The reaction is catalyzed by a combination of Ni(COD)2 and a sterically hindered, electron-rich N-heterocyclic carbene ligand or its analogous Ni(NHC)(arene) complex. The reaction is highly selective for anti-Markovnikov addition to α-olefins, as well as for the formation of linear alkylheteroarenes from internal alkenes. The reaction occurs
Palladium‐Catalyzed Intermolecular Dicarbofunctionalization of Unactivated Alkenes: Synthesis of Fluoroalkylated Heterocycles with All‐Carbon Quaternary Centers
The redox-neutral Pd-catalyzed dicarbofunctionalization of unactivatedalkenes with a variety of functionalized perfluoroalkyl halide is presented. This transformation enables the assembly of diversified fluoroalkylated pyrrolo[1,2-a]indoles with one all-carbon quaternary center in high regioselectivity. Mechanistic studies suggest the generation of perfluoroalkyl radicals from the single electron
Amide-Directed Intramolecular Co(III)-Catalyzed C–H Hydroarylation of Alkenes for the Synthesis of Dihydrobenzofurans with a Quaternary Center
作者:Asier Carral-Menoyo、Nuria Sotomayor、Esther Lete
DOI:10.1021/acs.joc.0c01413
日期:2020.8.7
example of Cp*Co(III)-catalyzed intramolecular hydroarylation of allyl aryl ethers using an amide directing group for the preparation of 3,3-disubstituted dihydrobenzofurans in high yields is described. The reaction of the unactivated alkene is completely selective for the formation of the quaternary center, allowing different substitution patterns on the aromatic ring and the alkene. The cyclization