Synthesis of Pyridines from Ketoximes and Terminal Alkynes via C–H Bond Functionalization
作者:Rhia M. Martin、Robert G. Bergman、Jonathan A. Ellman
DOI:10.1021/jo202280e
日期:2012.3.2
An expedient one-pot rhodium catalyzed C–H bond functionalization/electrocyclization/dehydration procedure has been developed for the synthesis of highly substituted pyridine derivatives fromterminal alkynes and α,β-unsaturated ketoximes. The use of electron-deficient phosphite ligands is important to suppress dimerization of the terminal alkynes to enynes.
Rhodium-Catalyzed Gram-Scale Synthesis of Highly Substituted Pyridine Derivatives
作者:Chien-Hong Cheng、Kanniyappan Parthasarathy
DOI:10.1055/s-0028-1088009
日期:2009.4
Rhodium-catalyzed chelation-assisted activation of the β-C-H bond of α,β-unsaturated ketoximes and subsequent reaction with alkynes affords highly substituted pyridine derivatives. This new method provides an opportunity for the one-pot synthesis of pyridines with all five positions (C2-C6) substituted.