Visible-Light-Mediated α-Arylation of Enol Acetates Using Aryl Diazonium Salts
作者:Thea Hering、Durga Prasad Hari、Burkhard König
DOI:10.1021/jo301984p
日期:2012.11.16
light mediates efficiently the α-arylation of enol acetates by aryl diazonium salts under mild conditions using [Ru(bpy)3]Cl2 as a photoredox catalyst. The broad scope of the reaction toward various diazonium salts and enol acetates was explored. The application of this reaction in the concise synthesis of 2-substituted indoles was demonstrated
A NOVEL NUCLEOPHILIC SUBSTITUTION OF THE FORMYL GROUP IN p-NITROBENZALDEHYDE WITH SOME CARBANIONS
作者:Genji Iwasaki、Seitaro Saeki、Masatomo Hamana
DOI:10.1246/cl.1986.173
日期:1986.2.5
p-Nitrobenzaldehyde reacts with some active methylene compounds in the presence of a strong base at low temperatures to give p-substituted nitrobenzenes by the two-step course involving the initial formation of the aldol adducts and the subsequent displacement of the carbinol moieties with excess carbanions.
Porphyrins as Photoredox Catalysts in Csp<sup>2</sup>–H Arylations: Batch and Continuous Flow Approaches
作者:Aline A. N. de Souza、Nathalia S. Silva、Andressa V. Müller、André S. Polo、Timothy J. Brocksom、Kleber T. de Oliveira
DOI:10.1021/acs.joc.8b02355
日期:2018.12.21
We have investigated both batch and continuous flow photoarylations of enol-acetates to yield different α-arylated aldehyde and ketone building blocks by using diazonium salts as the aryl-radical source. Different porphyrins were used as SET photocatalysts, and photophysical as well as electrochemical studies were performed to rationalize the photoredox properties and suggest mechanistic insights.