Ag(I) complexes of benzimidazol-2-ylidene ligands: a study of catalytic efficiency towards three-component coupling reactions

Authors : Rafet KILINÇARSLAN, Naim SADIÇ, Bekir ÇETİNKAYA

Pages : 681-687

View : 11 | Download : 4

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The $N$-heterocyclic carbene insert ignore into journalissuearticles values(NHC);--Aginsert ignore into journalissuearticles values(I); complexes 3a-c were synthesized from benzimidazolium chlorides insert ignore into journalissuearticles values(2a-c = NHC.HCl);, incorporating benzyl derivatives and a 2-methoxyethyl group insert ignore into journalissuearticles values(a: $^{3}$N = 2,4,6-trimethylbenzyl; b: $^{3}$N = 2,3,5,6-tetramethylbenzyl; c: $^{3}$N = pentamethylbenzyl);. The compounds were characterized by spectroscopic and elemental analyses. The synthesized NHC-Aginsert ignore into journalissuearticles values(I); complexes insert ignore into journalissuearticles values(3a-c); were tested as catalysts for the catalytic three-component coupling reaction of aldehyde, alkyne, and amine to propargylamines in various solvents. All complexes were active catalysts for catalytic three-component coupling reactions with good yields under neat and mild conditions insert ignore into journalissuearticles values(after 4 h, yields of up to 94%);.
Keywords : N heterocyclic carbene, benzimidazol 2 ylidene, coupling reaction, catalyst