7501-57-7Relevant articles and documents
α-Chlorobenzylation of Nitroarenes via Vicarious Nucleophilic Substitution with Benzylidene Dichloride: Umpolung of the Friedel-Crafts Reaction
Brze?kiewicz, Jakub,Loska, Rafa?,Makosza, Mieczys?aw
, p. 8499 - 8508 (2018/06/25)
Readily available α,α-dichlorotoluenes enter a vicarious nucleophilic substitution (VNS) reaction with electron-deficient arenes to give α-chlorobenzylated nitrobenzenes, as well as six- and five-membered heterocycles. Oxidation of the initially formed α-chlorobenzylic carbanions instead of protonation results in formation of diaryl ketones, providing a means for overall nucleophilic C-H benzoylation of electron-deficient aromatic rings. Alternatively, benzoylated nitroarenes can be obtained via the reaction of isolated α-chlorodiarylmethanes with sodium azide.
Mandelic Acid as Synthetic Equivalent of Benzoyl Carbanion. Synthesis of Nitrobenzophenones
Blay, Gonzalo,Cardona, Luz,Fernández, Isabel,Michelena, Raquel,Pedro, José R.,Ramírez, Teresa,Ruiz-García, Rafael
, p. 2325 - 2328 (2007/10/03)
Nitrobenzophenones are prepared from a mandelic acid dioxolanone. The sequence starts with the aromatic nucleophilic substitution of the enolate of the dioxolanone onto p-fluoronitrobenzenes, followed by hydrolysis of the acetal moiety and oxidative decarboxylation of the resulting α-hydroxyacids. The whole sequence involves the use of mandelic acid as synthetic equivalent of the benzoyl carbanion.