Preparation of a magnetic copper NNN pincer complex as an efficient catalyst in the synthesis of 4-(phenylethynyl) and 4-(4-phenyl-1H-1,2,3-triazol-5-yl)coumarin derivatives
作者:Fatemeh Rafiee、Omolbanin Nazari
DOI:10.1016/j.molstruc.2023.136482
日期:2023.12
nanocomposite was determined to be 9.9%wt. Then, its application in the synthesis of 4-(phenylethynyl)coumarin derivatives through CC bond formation between substituted 4-hydroxycoumarin and phenylacetylene derivatives was evaluated. After functionalizing of 4-position in 4-hydroxycoumarins with phenylacetylene derivatives, sodium azide was added and substituted 4-triazole-coumarins were synthesized in
本研究制备了3-氨基三甲氧基硅烷修饰的磁性载体,并通过2,4,6-三氯-1,3,5-三嗪作为有机连接体,用呋喃-2-碳酰肼功能化,形成富氮钳子。铜配位的类型配体。所制备的纳米复合材料(Fe 3 O 4 @SiO 2 -FCH(NNN钳)/Cu)的结构和形貌通过FT-IR、FE-SEM、VSM、TEM、ICP、XRD和EDX分析等多种技术进行了证实。纳米复合材料中Cu的含量测定为9.9%wt。然后,将其在C合成4-(苯乙炔基)香豆素衍生物中的应用评估了取代的4-羟基香豆素和苯乙炔衍生物之间的C键形成。用苯乙炔衍生物对4-羟基香豆素中的4位进行官能化后,添加叠氮化钠,在少量Fe 3 O 4 @SiO 2 -FCH(NNN钳形)/Cu纳米催化剂存在下合成取代的4-三唑香豆素。使用外部磁铁可以轻松分离纳米催化剂,并重复使用至少四次,而不会降低其活性。