Palladium-catalyzed double carbonylation-based diversity-oriented synthesis of 3,4-dihydroisoquinoline-1-carboxamides

A novel palladium-catalyzed double carbonylation approach toward the synthesis of 3,4-dihydroisoquinoline-1-carboxamides is reported. The method developed involves an initial palladium-catalyzed double carbonylation of an N-protected alkylamine aryliodide to afford an α-keto carboxamide intermediate, which on subsequent deprotection undergoes intramolecular imine formation to afford the benzo-azacyclic product.

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