Nanosilica-bonded N-(propylsulfonyl) piperazine-N-sulfamic acid as recyclable catalyst for synthesis of 1,1′-(arylmethylene) diureas and 1,3,5-triazinane-2,4-dithiones
作者:Parizad Rezaee、Jamal Davarpanah
DOI:10.1007/s11164-015-2376-8
日期:2016.9
Nanosilica-bonded N-(propylsulfonyl) piperazine-N-sulfamic acid was easily prepared by functionalizing silica nanoparticles and characterized by thermogravimetric analysis, scanning electron microscopy, infrared (IR) spectroscopy, elemental analyses, and ion-exchange pH analysis. The catalytic activity of the functionalized nanosilica for preparation of 1,1′-(arylmethylene) diureas from reaction of
纳米二氧化硅键合的N-(丙基磺酰基)哌嗪-N-氨基磺酸可通过对二氧化硅纳米粒子进行功能化而轻松制备,并通过热重分析,扫描电子显微镜,红外(IR)光谱,元素分析和离子交换pH分析进行表征。考察了官能化纳米二氧化硅从醛类与脲衍生物的反应中制备1,1'-(芳基亚甲基)双脲的催化活性。该催化剂的有效作用导致高产率地制备1,1'-(芳基亚甲基)二脲。在相同的反应条件下,醛与硫脲的反应得到高产率的1,3,5-三嗪烷-2,4-二硫酮。催化剂的可重用性,简单的后处理程序和较短的反应时间是该协议的其他优点。