作者:Hassan Sanati、Zahra Karamshahi、Ramin Ghorbani-Vaghei
DOI:10.1007/s11164-018-3638-z
日期:2019.2
This work describes a new method for a one-pot multicomponent condensation of a variety of aldehydes with dimedone and malononitrile in water, providing a simple and effectual procedure for preparing 4H-chromene under reflux conditions with magnetic nanoparticles supported on functionalized 7-aminonaphthalene-1,3-disulfonic acid-functionalized silica as catalyst. (Fe3O4@SiO2@Propyl–ANDSA) has been investigated as a novel catalyst in this reaction. This protocol is novel in (1) avoiding toxic solvents (2) introducing a catalyst with ideal features such as chemical stability, low toxicity, cost-effectiveness and, most importantly, easy, fast and comfortable separation using an external magnet.
本研究描述了一种新的方法,在水相中通过一步法多元共聚技术将多种醛与二甲基二酮和丙二腈反应,使用负载在功能化7-氨基萘-1,3-二磺酸-功能化硅胶上的磁性纳米粒子(Fe3O4@SiO2@丙基-ANDSA)作为催化剂,在回流条件下简单高效地制备了4H-色烯。这种催化剂作为新型催化剂在该反应中被研究。该方案的创新点在于(1)避免了有毒溶vents的应用;(2)引入了一种具有理想特性的催化剂,如化学稳定性、低毒性、成本效益高,最重要的是,利用外置磁铁实现快速、简单和舒适的分离。