Martin RM, Bergman RG, Ellman JA. Synthesis of pyridines from ketoximes and terminal alkynes via C-H bond functionalization.
J Org Chem 2012;
77:2501-7. [PMID:
22332639 PMCID:
PMC3292635 DOI:
10.1021/jo202280e]
[Citation(s) in RCA: 132] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
An expedient one-pot rhodium catalyzed C-H bond functionalization/electrocyclization/dehydration procedure has been developed for the synthesis of highly substituted pyridine derivatives from terminal alkynes and α,β-unsaturated ketoximes. The use of electron-deficient phosphite ligands is important to suppress dimerization of the terminal alkynes to enynes.
Collapse