Chitosan: highly efficient, green, and reusable biopolymer catalyst for the synthesis of alkylaminophenols via Petasis borono–Mannich reaction
作者:Sirigi Reddy Sudharsan Reddy、Bhoomireddy Rajendra Prasad Reddy、Peddiahgari Vasu Govardhana Reddy
DOI:10.1016/j.tetlet.2015.07.004
日期:2015.8
nafion® 117, PEG-OSO3H, tween® 80, poly styrene –SO3H and chitosan for the preparation of alkylaminophenols through Petasis borono–Mannich reaction by one-pot three component condensation of o-hydroxy aldehydes, secondary amines, and various boronic acids. It was observed that the reaction was completed in a short period of time and the yield was optimum by virtue of chitosan heterogeneous catalyst. Furthermore
我们筛选了不同的功能化聚合催化剂,如nafion®117,PEG-OSO 3 H,tween®80,聚苯乙烯–SO 3 H和壳聚糖,通过一锅三锅法通过波塔西斯·波罗诺–曼尼希反应制备烷基氨基酚的催化功效。邻羟基醛,仲胺和各种硼酸的组分缩合。观察到反应在短时间内完成,并且由于壳聚糖非均相催化剂的产率是最佳的。此外,可以通过简单的过滤来回收催化剂,并且可以重复使用多达十个循环。从重复使用的第六个周期开始观察到催化活性的平稳损失。