1H-imidazol-3-ium tricyanomethanide {[HIM]C(CN)3} as a nanostructured molten salt catalyst: application to the synthesis of pyrano[4,3‐b]pyrans
作者:Mohammad Ali Zolfigol、Meysam Yarie、Saeed Baghery、Abbas Khoshnood、Diego A. Alonso
DOI:10.1007/s11164-016-2826-y
日期:2017.5
Additionally, the catalytic activity of [HIMI]C(CN)3} (1, 2 mol%) has been tested in a three-component domino Knoevenagel condensation reaction. A range of structurally diverse aromatic aldehydes (2a–p), malononitrile (3), and 4‐hydroxy‐6‐methyl‐2 H ‐pyran‐2‐one (4) are tolerated for the synthesis of 2-amino-7-methyl-5-oxo-4-aryl-4,5-dihydropyrano[4,3-b]pyran-3-carbonitrile derivatives (5a–p) under neat conditions
在这项工作中,我们已经合成了一种新型的纳米结构熔融盐1 H-咪唑-3-三氰基甲磺酸[HIMI] C(CN)3 }(1),作为一种高效且绿色协议兼容的催化剂。这种新的熔融盐已通过多种分析技术进行了全面表征,例如FT-IR,1 HNMR,13 CNMR,热重分析,导数热重分析,差热分析,X射线衍射,扫描电子显微镜和分辨率透射电镜。此外,[HIMI] C(CN)3的催化活性}(1,2 mol%)已在三组分多米诺Knoevenagel缩合反应中进行了测试。可以耐受一系列结构多样的芳族醛(2a-p),丙二腈(3)和4-羟基-6-甲基-2 H- 吡喃-2-酮(4)来合成2-氨基-7-甲基-5-氧代-4-芳基-4,5-二氢吡喃[4,3-b]吡喃-3-腈衍生物(5a–p)在纯净条件下于50°C进行。所得结果表明,催化剂1显示出令人感兴趣的催化性能,例如干净的反应曲线,成本效益和绿色条件。重要的是,上述