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Site-Selective Double and Tetracyclization Routes to Fused Polyheterocyclic Structures by Pd-Catalyzed Carbonylation Reactions.

Francesco PancrazziNicolò SartiPaolo P MazzeoAlessia BacchiCarla CarfagnaRaffaella MancusoBartolo GabrieleMirco CostaAndrás StirlingNicola Della Ca'
Published in: Organic letters (2020)
In this contribution, we report novel palladium-catalyzed carbonylative cascade approaches to highly functionalized polyheterocyclic structures. The Pd-catalyzed carbonylative process involves the regioselective insertion of one to three CO molecules and the sequential ordered formation of up to eight new bonds (one C-O, two C-C, five C-N). The exclusive formation of six-membered heterocycles is elucidated by detailed modeling studies.
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