Griswold A, Bloom S, Lectka T. A chelating nucleophile plays a starring role: 1,8-naphthyridine-catalyzed polycomponent α,α-difluorination of acid chlorides.
J Org Chem 2014;
79:9830-4. [PMID:
25222052 DOI:
10.1021/jo501534k]
[Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A dually activated ketene enolate, generated from an acid chloride, the unusual chelating nucleophile (1,8-naphthyridine), and a Lewis acid, reacts to afford a host of α,α-difluorinated products in the presence of a benchtop-stable fluorinating agent (Selectfluor). The use of this method to synthesize otherwise difficult to make products is highlighted along with computational and spectroscopic support for the proposed chelate.
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