Unsworth WP, Coulthard G, Kitsiou C, Taylor RJK. Direct imine acylation for molecular diversity in heterocyclic synthesis.
J Org Chem 2014;
79:1368-76. [PMID:
24437593 DOI:
10.1021/jo402768r]
[Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Imines and carboxylic acids have been directly coupled using propylphosphonic acid anhydride and NEt(i-Pr)2 to give N-acyliminium ions, which were intramolecularly trapped with oxygen, nitrogen, sulfur, and carbon nucleophiles to provide a wide range of structurally diverse heterocycles.
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