The deep eutectic melt of sorbitol and metformin hydrochloride: synthesis of 3-substituted 2-aminonaphtho[2,3-b]furan-4,9-diones and their photophysical properties
作者:Kurosh Rad-Moghadam、Seyyed Ali Reza Mousazadeh Hassani、Saeedeh Toorchi Roudsari
DOI:10.1039/c5ra19619a
日期:——
An efficient and environmentally benign one-pot method is presented for the diverse synthesis of 3-substituted2-aminonaphtho[2,3-b]furan-4,9-diones via the domino reaction between 2-hydroxy-1,4-naphthoquinone, β-nitrostyrenes and ammonium acetate in a new deep eutectic solvent made of sorbitol and metformin HCl. A pronounced positive solvatochromism was observed for the electron-donor–acceptor conjugated
通过2-羟基-1,4-萘醌之间的多米诺反应,提出了一种高效且环境友好的一锅法,用于3-取代的2-氨基萘[2,3 - b ]呋喃-4,9-二酮的多样化合成,β-硝基苯乙烯和乙酸铵在由山梨糖醇和盐酸二甲双胍制成的新型深共熔溶剂中。这些产品的电子-供体-受体共轭体系观察到明显的正溶剂溶变色,导致它们在极性和质子溶剂中的可见吸收带发生红移和增色移动。从非极性溶剂变为极性溶剂时观察到约30 nm的红移,并引起明显的颜色变化。