这项工作得到了西班牙国家科学与创新部长 (MICINN)(授权号 CTQ2007-65218、CTQ2011-24151)、Consolider Ingenio(授权号 2010-CSD2007-00006)、Generalitat number Valenciana/g200 039) 和 Fondos Europeos para el Desarrollo Regional (FEDER)。YM 和 M.J.A. 承认阿利坎特大学的 ISO 的赠款。
Gold nanoparticles stabilized by PEG-tagged imidazolium salts as recyclable catalysts for the synthesis of propargylamines and the cycloisomerization of γ-alkynoic acids
stabilizers for the preparation of water-soluble gold nanoparticles by reduction of tetrachloroauric acid with sodiumborohydride. The nanomaterials have been characterized. The X-Ray Photoelectron Spectroscopy (XPS) indicated the presence of Au(I) and Au(0) species, the oxidized form being more abundant in the nanomaterial derivedfrom the tris-imidazolium bromide. The catalytic activity of these gold
Semiconductor-Gold Nanocomposite Catalysts for the Efficient Three-Component Coupling of Aldehyde, Amine and Alkyne in Water
作者:Leng Leng Chng、Jun Yang、Yifeng Wei、Jackieâ Y. Ying
DOI:10.1002/adsc.200900518
日期:2009.11
An efficient heterogeneous lead sulfide-gold catalyst has been successfully developed for the synthesis of propargylic amines via a three-componentcoupling reaction of aldehyde, amine and alkyne in water. The process is simple and applicable to a diverse range of aromatic and aliphatic aldehydes, amines and alkynes. Furthermore, the catalyst is stable to air and water, and can be easily recovered
cationic [Ag(IPr)2]PF6 [IPr = 1,3-bis(2,6-diisopropylphenyl)imidazolylidene] complex proved to be a versatile and highly efficient catalyst for the production of propargylamines by using the A3-coupling reaction. The reaction conditions were equally applicable to aliphatic and aromatic aldehydes and alkynes, including highly hindered aromatic aldehydes. Progargylamines were prepared in short reaction times