生产了由MCM-48 / H 5 PW 10 V 2 O 40组成的非均质材料,并将其用作高效,生态友好且高度可回收的催化剂,用于3,4-二氢喹喔啉-2-胺的一锅多组分合成,二氮杂-四唑和苯并二氮杂-2-羧酰胺衍生物在水性介质中和室温下以高收率在较短的反应时间(40-60分钟)内产生。可回收的催化剂易于循环至少五次,而没有任何催化活性的损失。使用1 H NMR和13 C NMR光谱确认获得的产物的结构。
Fe3O4/SiO2 nanoparticles: an efficient and magnetically recoverable nanocatalyst for the one-pot multicomponent synthesis of diazepines
作者:Ali Maleki
DOI:10.1016/j.tet.2012.07.034
日期:2012.9
In this research, a new protocol for the one-pot multicomponent synthesis of diazepine derivatives using a 1,2-diamine, a linear or cyclic ketone, and an isocyanide in the presence of a catalytic amount of silica-supported iron oxide (Fe3O4/SiO2) nanoparticles at ambient temperature in excellent yields is described.
Supported <i>p</i>-Toluenesulfonic Acid as a Highly Robust and Eco-Friendly Isocyanide Scavenger
作者:Jhonny Azuaje、Alberto Coelho、Abdelaziz El Maatougui、José Manuel Blanco、Eddy Sotelo
DOI:10.1021/co100035z
日期:2011.1.10
We document here the use of polymer-supported p-toluenesulfonic acid as a highly effective, robust, economical and eco-friendly isocyanide scavenger. The herein described strategy; circumvent the intense and repulsive odor of volatile isocyanides, enabling simplified and odorless workup and purifications. The usefulness of the new scavengers has been validated in a set of diverse isocyanide-based organic transformations and this approach is also amenable to parallel synthesis techniques.