The syntheses of silica-supported oligomeric benzyl phosphates (Si-OBPn) and triazole phosphates (Si-OTPn) using ring-opening metathesis polymerization (ROMP) for use as efficient alkylating reagents is reported. Ease of synthesis and grafting onto the surface of norbornenyl-tagged (Nb-tagged) silica particles has been demonstrated for benzyl phosphate and triazole phosphate monomers. It is shown that these silica polymer hybrid reagents, Si-OBPn and Si-OTPn, can be used to carry out alkylation reactions with an array of different nudeophiles to afford the corresponding benzylated and (triazolyl)methylated products in good yield and high purity.
Supported copper (I) catalyst from fish bone waste: An efficient, green and reusable catalyst for the click reaction toward <i>N</i>
-substituted 1,2,3-TRIAZOLES
作者:Xingquan Xiong、Zhongke Tang、Zhaohong Sun、Xiaoqing Meng、Sida Song、Zhilong Quan
DOI:10.1002/aoc.3946
日期:2018.1
An eco‐efficient, green, and multi‐gram procedure is presented for one‐pot multicomponentsynthesis of N‐substituted 1,2,3‐triazoles by using waste fishbone powders supported CuBr (FBPs‐CuBr) as catalyst. FBPs‐CuBr is found to be an efficient heterogeneous catalyst and a series of 1,2,3‐triazoles are obtained in moderate to excellent yields in water under MW irradiation (70–98%). It can be separated
Lanthanum loaded CuO nanoparticles: synthesis and characterization of a recyclable catalyst for the synthesis of 1,4-disubstituted 1,2,3-triazoles and propargylamines
A click and three component A3 coupling reactions were achieved by lanthanum loaded CuO NPs under ultrasonication. 1,4-Disubstituted 1,2,3-triazoles and propargylamines were synthesized in a short reaction time with high regioselectivity and yields.
CuAAC Macrocyclization: High Intramolecular Selectivity through the Use of Copper–Tris(triazole) Ligand Complexes
作者:Gagan Chouhan、Keith James
DOI:10.1021/ol200861f
日期:2011.5.20
A range of multivalent heteroaryl ligands, copper sources, and solvent systems have been Investigated for use in CuAAC-mediated macrocyclization reactions. These studies have revealed the key factors governing selectivity for macrocyclization versus dimerization and identified a simple but specific set of reaction conditions capable of efficiently generating a diverse series of drug-like macrocycles at modest dilution in up to 95% yield.