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。
An efficient, one-pot synthesis of 2-amino-4H-chromenes catalyzed by (α-Fe2O3)-MCM-41-supported dual acidic ionic liquid as a novel and recyclable magnetic nanocatalyst
作者:Shahnaz Rostamizadeh、Negar Zekri
DOI:10.1007/s11164-015-2152-9
日期:2016.3
efficient magnetic heterogeneous nanocatalyst for one-pot three-component synthesis of some new and known 2-amino-4H-chromenes in water medium conditions. This catalyst was more efficient than other reported catalysts for the synthesis of 2-amino-3-cyano-7-hydroxy-4H-chromenes. High product yields, short reaction times, use of non-corrosives, a robust and reusable magnetic nanocatalyst and water as a green