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Interaction of 3-(α- or γ-R-pyridin-2-yl)-1,2,4-triazines (R = Me, CO 2 Me) with arynes affords either the domino-transformation products, pyrido[1,2- a ]indoles, or Diels-Alder reaction ones, isoquinolines. The influence of the nature and/or position of the substituent on the reaction pathway is discussed.

Aryne-Mediated Transformations of 3-(α- or γ-R-2-pyridyl)-1,2,4-Triazines: Id Diels-Alder Reaction vs Domino Transformation