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The reaction of 2-aryl-2H-isoindoles with trifluoroacetic anhydride in pyridine leads to the formation of the corresponding 1-trifluoroacetyl-2-aryl-2H-isoindoles with acceptable yields. 1-Alkylthio-2-aryl-2H-isoindoles can be generated from 3-alkylthio-2-aryl-1 H-isoindolium-tri-fluoromethanesulfonates with pyridine and acylated in the same manner. Protonation occurs at 1-position and yields isolable 1H-isoindolium salts.

1,2‐Di(bromomethyl)benzene (I) is coupled with the anilines (II) to produce the N‐arylisoindolenines (III) as the main products, together with minor amounts of the dimers (IV).

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