Copper Exchanged SiO2/Al2O3 Catalyst Prepared by Sol-Gel Method for Intermolecular Hydroamination of Terminal Alkynes

MAu2GeS4-Chalcogel (M = Co, Ni): Heterogeneous Intra- and Intermolecular Hydroamination Catalysts

“…The inter- and intramolecular hydroamination of hydrocarbons can be efficiently and selectively achieved through metal catalysis . Good progress has been made by using metal complex catalysts under homogeneous conditions. − However, there are few reports on heterogeneous hydroamination catalysis, such as zeolites, , metal-cation exchanged zeolites, carbon black and glassy carbon supported Rh­(I) complexes, mesoporous silica encapsulated Rh complex, tungstophosphoric acid (TPA) and silver-exchanged tungstophosphoric acid (AgTPA), nitrogen-rich mesoporous carbon, SiO 2 and TiO 2 supported Au nanoparticles, ion-exchanged montmorillonite, oxide supported Pd and Au complexes, Al 2 O 3 supported Ni particles, sol–gel immobilized Rh complex, supported ionic-liquid phase catalysts, Cu-exchanged SiO 2 /Al 2 O 3 , polymer supported organo–lanthanide complexes, Zn–Co double metal cyanides, metal complexes supported in a thin film of ionic liquid, silica supported Co catalysts, transition metal exchanged clays, and polymer bound oxidovanadium complexes . However, no work has been reported on heterogeneous catalytic hydroamination using chalcogenide based aerogels (chalcogels).…”

Copper-Catalyzed Hydroamination of Alkynes with Aliphatic Amines: Regioselective Access to (1E,3E)-1,4-Disubstituted-1,3-dienes

“…Only a few reports have been developed for intermolecular reactions. Most of them make use of heterogeneous copper-supported catalysts and are limited to the formation of imines from primary amines . Only one example of a simple hydroamination of terminal alkynes with anilines affording the corresponding imines has been described (with CuCl used in homogeneous conditions) .…”