Site-Selective Double and Tetracyclization Routes to Fused Polyheterocyclic Structures by Pd-Catalyzed Carbonylation Reactions.
Org Lett 2020;
22:1569-1574. [PMID:
32011899 PMCID:
PMC7307965 DOI:
10.1021/acs.orglett.0c00171]
[Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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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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