spectroscopic studies. Molecular structures of complexes 1, 2 and 4 were determined by X-ray crystallography. Copper complexes (1-4) were employed as a catalyst for the [3+2] cycloaddition and A3-couplingreactions. A mutual approach of salen-type ligands and metal via active participation of ligands allow to achieve the catalytic reactions. Reaction pathways were proposed and possible intermediate species
An efficient synthesis of propargylamines via C–H activation catalyzed by copper(<scp>i</scp>) in ionic liquids
作者:Soon Bong Park、Howard Alper
DOI:10.1039/b416268d
日期:——
A readily available copper(I) catalyst, in an ionic liquid, can effect three-component coupling of aldehydes, amines and alkynes to generate propargylamines in high yields.
一种 readily available (易得的)铜(I) 催化剂,使用离子液体,可以实现醛、胺和炔烃的三组分耦合,生成高产率的丙炔胺。
A<sup>3</sup>
-Coupling Reaction and [Ag(IPr)<sub>2</sub>
]PF<sub>6</sub>
: A Successful Couple
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
moiety for the ligation and the hydroxymethylgroup is used as a hook to immobilize the catalyst on a polymeric resin. With a futuristic scope to incorporate additional functionalities into the catalyst system, a tri-functional tyrosine is inserted into the core and the amino group of tyrosine is kept Fmoc-protected. The applications of the developed catalyst system are demonstrated in two important