Modular Synthesis of Multisubstituted Furans through Palladium-Catalyzed Three-Component Condensation of Alkynylbenziodoxoles, Carboxylic Acids, and Imines
作者:Junliang Wu、Naohiko Yoshikai
DOI:10.1002/anie.201504687
日期:2015.9.14
regiocontrolled synthesis of a multisubstitutedfuran is achieved through Pd(OAc)2‐catalyzed room‐temperature condensation of an alkynylbenziodoxole, a carboxylicacid, and an enolizable ketimine, which contribute to C1, CO, and C2 fragments, respectively, to the furan skeleton. The reaction tolerates a broad range of functional groups in each of the reaction components, and enables highly modular and flexible
Directed C-H Alkenylation of Aryl Imines with Alkenyl Phosphates Promoted by a Cobalt-N-Heterocyclic Carbene Catalyst
作者:Pin-Sheng Lee、Wengang Xu、Naohiko Yoshikai
DOI:10.1002/adsc.201701105
日期:2017.12.19
We report herein an ortho‐C–Halkenylation reaction of arylimines with alkenylphosphatespromoted by a cobalt–N‐heterocyclic carbene (NHC) catalytic system. While commercially available bulky NHC ligands exhibited only modest catalytic activity, elaboration of the nitrogen substituents and backbone of the NHC enabled the desired transformation to proceed in high yield at a mild temperature. The new