Oxidative Alkylation of 1,3-Diarylpropenes using O2 catalysed by 2,3-dichloro-5,6-dicyano-benzoquinone and N-hydroxyphthalimide

Propargylation of 1,3-dicarbonyl compounds catalyzed by 2,3-dichloro-5,6-dicyano-1,4-benzoquinone and sodium nitrite in the presence of molecular oxygen and formic acid

The coupling reaction of 1,3-diarylpropyne and 1,3-dicarbonyl compounds using molecular oxygen as a terminal oxidation was developed. Catalyzed by DDQ and NaNO₂ in the presence of HCOOH, the corresponding products were obtained in 37–87% yields.

Oxidative Coupling Reaction of 1,3-diarylpropenes with Propane-1,3-dione Derivatives Mediated by 2,3-dichloro-5,6-dicyano-1,4-benzoquinone with Molecular Oxygen

An oxidative coupling reaction between 1,3-diarylpropenes and propane-1,3-dione derivatives mediated by a catalytic amount of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone and azobisisobutyronitrile with molecular oxygen has been developed. The corresponding products are obtained in moderate to good yields.

Bimolecular Coupling Reactions through Oxidatively Generated Aromatic Cations: Scope and Stereocontrol

Chromenes, isochromenes, and benzoxathioles react with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone to form stable aromatic cations that react with a range of nucleophiles. These oxidative fragment coupling reactions provide rapid access to structurally diverse heterocycles. Conducting the reactions in the presence of a chiral Brønsted acid results in the formation of an asymmetric ion pair that can provide enantiomerically enriched products in a rare example of a stereoselective process resulting from the generation of a chiral electrophile through oxidative carbon-hydrogen bond cleavage.