Biocompatible Ionic Liquid Promote One-Pot Synthesis of 2-Amino-4H-Chromenes Under Ambient Conditions
作者:Anlian Zhu、Qixing Li、Wanlu Feng、Dongshuang Fan、Lingjun Li
DOI:10.1007/s10562-020-03332-7
日期:2021.3
The synthesis of 2-amino-4H-chromenes through one-pot multicomponent reactions has received great attention due to the high atom efficiency and the broad bioactivities of the products. Here, the catalytic performances of a series of functional ionic liquids towards this type of reaction were investigated and the results showed that the ionic liquid, choline acetate ([Choline][Ac]), could efficiently
Tungstic acid functionalized mesoporous SBA-15: A novel heterogeneous catalyst for facile one-pot synthesis of 2-amino-4H-chromenes in aqueous medium
作者:Sudipta K. Kundu、John Mondal、Asim Bhaumik
DOI:10.1039/c3dt50947h
日期:——
A new highly ordered mesoporous tungstic acid functionalized SBA-15, TAFMC-1 has been synthesized via post-synthesis modification of mesoporousSBA-15 with (3-chloropropyl) triethoxysilane followed by substitution reaction of chlorine atom of the 3-chloropropyl group by tungstic acid group under refluxing conditions in n-hexane. The tungstic acid functionalized mesoporoussilica material has been characterized
Enhancement of catalytic activity in the synthesis of 2-amino-4H-chromene derivatives using both copper- and cobalt-incorporated magnetic ferrite nanoparticles
magnetically separable nanocatalysts for the synthesis of 2-amino-4H-chromene derivatives. A wide range of 2-amino-3-cyano-7-hydroxy-4(phenyl)-4 H-chromenes were synthesized with high isolated yields during very short reaction times using Cu0.5Co0.5Fe2O4. Interestingly, the catalyst could be separated using only a simple magnetic decantation and reused six times with no considerable loss of efficiency
制备,表征和表征了Cu 0.5 Co 0.5 Fe 2 O 4磁性纳米粒子,并将其用作台式,高活性和磁性可分离的纳米催化剂,用于合成2-氨基-4 H- 色烯衍生物。使用Cu 0.5 Co 0.5 Fe 2 O 4在很短的反应时间内以高分离产率合成了范围广泛的2-氨基-3-氰基-7-羟基-4(苯基)-4 H- 色烯。有趣的是,仅使用简单的磁性倾析就可以分离催化剂,并且可以重复使用六次,而不会明显降低效率。Cu 0.5的高催化活性Co 0.5 Fe 2 O 4纳米颗粒归因于其框架中同时存在铜和钴,与掺有单金属的尖晶石相比,它具有协同催化作用,并具有增强的活性。