Polymer anchored Cu(ii) complex: an efficient and recyclable catalytic system for the one-pot synthesis of 1,4-disubstituted 1,2,3-triazoles starting from anilines in water
作者:Susmita Roy、Tanmay Chatterjee、Sk. Manirul Islam
DOI:10.1039/c3gc41114a
日期:——
An efficient procedure for the one-pot synthesis of 1,4-disubstituted 1,2,3-triazole derivatives has been developed by the ‘click’ reaction of azides generated in situ from anilines or amines and terminal acetylenes catalyzed by the polymer anchored Cu(II) catalyst in water without using any additives. The polymer anchored Cu(II) catalyst was synthesized and its catalytic activity was evaluated in
Cu(II)-anchored functionalized mesoporous SBA-15: An efficient and recyclable catalyst for the one-pot Click reaction in water
作者:Susmita Roy、Tanmay Chatterjee、Malay Pramanik、Anupam Singha Roy、Asim Bhaumik、Sk. Manirul Islam
DOI:10.1016/j.molcata.2014.01.027
日期:2014.5
A new pyridine-imine functionalized mesoporus silica (SBA-15) has been synthesized through the Schiff-base condensation of 3-aminopropyl functionalized SBA-15 with 2-pyridinecarboxaldehyde followed by the grafting of Cu(II) onto it resulting a new Cu@Pylm-SBA-15 material. 20-hexagonally ordered mesophases of the material are analyzed by small-angle powder X-ray diffractions (PXRD) and transmission electron microscopic (TEM) image analyses. The Cu(ll)-anchored mesoporous material, Cu@PyIm-SBA-15 showed excellent catalytic activity towards the one pot click reaction between azides formed in situ from the corresponding amines and acetylenes in water at 0 C to room temperature resulting a wide variety of 1,4-disubstituted 1,2,3-triazoles. The catalyst has been recycled for five cycles without any appreciable loss of catalytic activity and also without any appreciable Cu-leaching, suggesting a future potential of this novel mesoporous catalyst for the synthesis of 1,4-disubstituted 1,2,3-triazoles. (C) 2014 Elsevier B.V. All rights reserved.