Formation of Benzocondensed Derivatives

A particular case of an ARCIS reaction leading to a benzocondensed derivative is represented by the formation of two Ar-Ar bonds in the same step. Triarylmethanols are generally used as the electrophilic partner in the reaction with internal aUcynes, catalyzed by a Rh/Cu-based system 

SCHEME 22.46 (a) Unsymmetrical hiaryls via Pd-catalyzed activation of the Ar—C bond in benzoic acids and (b) mechanism of the Pd-mediated cross-coupUng reaction. 

SCHEME 22.47 Decarboxylative cross-coupling of aryl sulfonates with aromatic carboxylates. 

SCHEME 22.48 Rh-catalyzed reactions of triarylmethanols with internal alkynes. 

MeO SCHEME 22.49 AROS reaction for the synthesis of functionalized triphenylenes. 

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