Nucleophilic Carbene and HOAt Relay Catalysis in an Amide Bond Coupling: An Orthogonal Peptide Bond Forming Reaction
作者:Harit U. Vora、Tomislav Rovis
DOI:10.1021/ja0764052
日期:2007.11.1
A catalyzed internal redox process provides a route from alpha-reducible aldehydes and amines; to alpha-reduced amides. The chemistry is catalyzed by nucleophilic carbenes and common peptide cocatalysts such as HOBt and HOAt in a relay fashion. The transformation proceeds in excellent yields using a variety of primary and secondary alkyl and aryl amines. The aldehyde component may be varied from haloaldehydes to epoxy and aziridino aldehydes as well as enals. The latter three substrates provide for a waste-free amide bond forming reaction.
Direct NHC-catalysed redox amidation using CO<sub>2</sub> for traceless masking of amine nucleophiles
作者:Robert W. M. Davidson、Matthew J. Fuchter
DOI:10.1039/c6cc04639h
日期:——
We report an amine masking strategy for N-heterocyclic carbene (NHC)-catalysed redox amidation that couples release of the free nucleophile to catalytic turnover, and in doing so, enables direct reaction of electron-rich amines.