[reaction: see text] The radicalchainreaction of benzenethiol with alkynylthiol esters provides a new, valuable protocol for the tin-free generation of acylradicals that arise from intramolecular substitution at sulfur by the initial sulfanylvinyl radicals.
The generation of 2-indolylacyl radicals from the corresponding phenyl selenoesters under reductive conditions and their behavior in intramolecularaddition reactions to carbon-carbondoublebonds located at the indole nitrogen have been studied. [reaction: see text]
Coupling Catalytic Alkene Hydroacylation and α-Arylation: Enantioselective Synthesis of Heterocyclic Ketones with α-Chiral Quaternary Stereocenters
作者:Avipsa Ghosh、James A. Walker、Arkady Ellern、Levi M. Stanley
DOI:10.1021/acscatal.6b00365
日期:2016.4.1
strategy that combines alkenehydroacylation and enantioselective α-(hetero)arylation reactions to form a wide variety of nitrogen-containing heterocyclic ketones bearing α-chiral quaternary stereogenic centers. Exo-selective, intramolecular Ni-catalyzed hydroacylations of N-homoallylindole- and N-homoallylpyrrole-2-carboxaldehydes form α-substituted six-membered heterocyclic ketones in up to 95% yield