Reddy MC, Jeganmohan M. Total synthesis of aristolactam alkaloids
via synergistic C-H bond activation and dehydro-Diels-Alder reactions.
Chem Sci 2017;
8:4130-4135. [PMID:
30155216 PMCID:
PMC6100235 DOI:
10.1039/c7sc00161d]
[Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 03/20/2017] [Indexed: 01/12/2023] Open
Abstract
A concise total synthesis of aristolactam alkaloids by a synergistic combination of C-H bond activation and dehydro-Diels-Alder reactions is described. To achieve the synthesis two new synthetic methodologies, namely the oxidative cyclization of benzamides with vinyl sulfone leading to 3-methyleneisoindolin-1-ones via a ruthenium-catalyzed C-H bond activation, and a dehydro-Diels-Alder reaction followed by the fluoride ion mediated desulfonylation of 3-methyleneisoindolin-1-ones with benzynes, were developed. The method presented allows the opportunity for the construction of all the rings of aristolactams from easily available starting materials.
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