Highly efficient and recyclable pre-catalysts based on mono- and dinuclear heteroleptic Cu(I) dithio- PPh3 complexes to produce variety of glycoconjugate triazoles
作者:Avadhesh K. Singh、Chote Lal Yadav、Kunj Bihari Mishra、Santosh K. Singh、Ajit N. Gupta、Vinod Kumar Tiwari、Michael G.B. Drew、Nanhai Singh
DOI:10.1016/j.mcat.2019.03.009
日期:2019.6
(C, H, N) analysis, IR, UV–vis., 1H, 13C1H}, and 31P1H} NMR spectroscopy and their structures have been revealed by X-ray crystallography. In the structures of (1,2)/(3,4) the copper atoms are situated within a four coordinate (P2S2)/(P2NS) distorted tetrahedral geometry. Notably in the dinuclear complexes 3 and 4, the dithiocarbimate ligands are bonded in a S, S- chelating mode to one copper atom
高效且可重复使用的预制单核和双核杂多铜(I)二硫代氨基甲酸酯和二硫代氨基甲酸酯络合物基催化剂,[Cu(PPh 3)2(L)]和[ Cu 2(PPh 3)4(L) ] ñ - (4-甲基吡啶基) - ñ - (3-甲基吡啶基)二硫代氨基甲酸-大号1 1,N-甲基呋喃基-N- methylthiophenedithiocarbamate-大号2 2 ; 4-氯苯dithiocarbimate 2-大号3 3,4-bromobenzenesulfonyldithiocarbimate 2-大号4 4)已被用于叠氮化物和炔烃的环加成反应中,以在Click化学中形成各种糖缀合物三唑。这些新的预催化剂已通过元素(C,H,N)分析,IR,UV-vis。,1 H,13 C 1 H}和31 P 1 H} NMR光谱进行了表征,并且它们的结构已经过由X射线晶体学显示。在(结构1,2)/(3,4)的铜原子位于四个坐标(P内2小号2)/(P