Thiolate-Protected Au25(SC2H4Ph)18 Nanoclusters as a Catalyst for Intermolecular Hydroamination of Terminal Alkynes
作者:Yasushi Obora、Tatsuki Nagata、Yurina Adachi
DOI:10.1055/s-0037-1610671
日期:2018.12
Au25(SC2H4Ph)18 nanoclusters have high catalytic activity for hydroamination of terminalalkynes. This reaction proceeds under O2 or air. The presence of molecular oxygen has a profound effect on the Au25(SC2H4Ph)18 reactivity. The catalysts can be separated from the mixture after the reaction and reused.
Exploring the reactivity of halogen-free aminopyridines in one-pot palladium-catalyzed C–N cross-coupling/C–H functionalization
作者:A. Sofia Santos、M. Margarida Martins、Ana C. Mortinho、Artur M.S. Silva、M. Manuel B. Marques
DOI:10.1016/j.tetlet.2020.152303
日期:2020.9
azaindoles and imidazopyridines. However, the functionalization of aminopyridines is challenging, due to their electronic properties and coordination with metals. Herein we describe a reactivity study of aminopyridines under palladium-catalyzed reaction conditions. Several aminopyridines underwent a one-pot Pd-catalyzed C–N crosscoupling reaction/C–H functionalization sequence affording azaindoles. The role
Superbase-Promoted Addition of Acetylene Gas to the C=N Bond
作者:Elena Yu. Schmidt、Ivan A. Bidusenko、Nadezhda I. Protsuk、Yan V. Demyanov、Igor A. Ushakov、Boris A. Trofimov
DOI:10.1002/ejoc.201900932
日期:2019.9.15
Acetylene gas readily adds to the C=N bond of ketimines in KOtBu/DMSO solution at room temperature to afford terminal propargylamines with a quaternary carbon center in up to 94 % yield. The reaction represents a new Csp3–Csp bond formation under mild transition metal free conditions using available widespread starting materials covering a broad scope of ketimines.