Shigeno M, Hayashi K, Nozawa-Kumada K, Kondo Y. Catalytic C(sp
2)-C(sp
3) Bond Formation of Methoxyarenes by the Organic Superbase
t-Bu-P4.
Org Lett 2020;
22:9107-9113. [PMID:
33175552 DOI:
10.1021/acs.orglett.0c03507]
[Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The organic superbase catalyst t-Bu-P4 achieves nucleophilic aromatic substitution of methoxyarenes with alkanenitrile pronucleophiles. A variety of functional groups [cyano, nitro, (non)enolizable ketone, chloride, and amide moieties] are allowed on methoxyarenes. Moreover, an array of alkanenitriles with/without an aryl moiety at the nitrile α-position can be employed. The system also features no requirement of a stoichiometric base, MeOH (not salt waste) formation as a byproduct, and the production of congested quaternary carbon centers.
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