1,3-二磺酸咪唑硫酸氢盐:一种可重复使用的高效离子液体,用于一锅多组分合成嘧啶并[4,5- b ]喹啉衍生物†
摘要:
通过6-氨基-1,3-二甲基尿嘧啶,醛和环1的三组分一锅缩合反应,开发了一种绿色,简便的合成嘧啶并[4,5- b ]喹啉衍生物的方法。在1,3-二磺酸咪唑硫酸氢盐[dsim] HSO 4存在下的3-二酮为有效催化剂。本方法提供了许多优点,例如优异的产率,简单的方法,短的反应时间,产物的高产率和容易的后处理程序。而且,该催化剂易于回收并且可以重复使用几次而其活性没有明显降低。
Aqua mediated indium(III) chloride catalyzed synthesis of fused pyrimidines and pyrazoles
作者:Jitender M. Khurana、Ankita Chaudhary、Bhaskara Nand、Anshika Lumb
DOI:10.1016/j.tetlet.2012.04.001
日期:2012.6
The utilization of water as solvent and indium trichloride as promoter for the three-component combinatorial synthesis of a variety of bioactive pyrimidine and pyrazole derivatives (2–10) from aldehydes, 1,3-dicarbonyl compounds, and electron-rich amino heterocycles like 6-amino-1,3-dimethyl uracil and 3-methyl-1-phenyl-1H-pyrazol-5-amine catalyzed by indium trichloride under reflux has been studied
An Efficient synthesis of pyrimido[4,5-<i>b</i>]quinoline and indeno[2′,1′:5,6]pyrido[2,3-<i>d</i>]pyrimidine derivatives via multicomponent reactions in ionic liquid
作者:Shun-Jun Ji、Sai-Nan Ni、Fang Yang、Jing-Wen Shi、Guo-Lan Dou、Xiao-Yue Li、Xiang-Shan Wang、Da-Qing Shi
DOI:10.1002/jhet.5570450310
日期:2008.5
A series of pyrimido[4,5-b]quinoline and indeno[2′,1′:5,6]pyrido[2,3-d]pyrimidine derivatives were synthesized via the three-component reaction of an aldehyde, 6-aminopyrimidine-2,4-dione and 5,5-dimethyl-1,3-cyclohexanedione or 1,3-indanedione in ionic liquid 1-n-butyl-3-methylimidazolium bromide ([bmim]Br). This protocol has the advantages of easier work-up, milder reaction conditions, high yields
通过醛6-氨基嘧啶的三组分反应合成了一系列嘧啶并[4,5- b ]喹啉和茚并[2',1':5,6]吡啶[2,3- d ]嘧啶衍生物离子液体1 - n-丁基-3-甲基咪唑鎓溴化物([bmim] Br)中的-2,4-二酮和5,5-二甲基-1,3-环己二酮或1,3-茚满二酮。与其他方法相比,该方案的优点是后处理容易,反应条件温和,收率高且对环境无害。
An eco-friendly and magnetized biopolymer cellulose-based heterogeneous acid catalyst for facile synthesis of functionalized pyrimido[4,5-b]quinolines and indeno fused pyrido[2,3-d]pyrimidines in water
energy-dispersive X-ray spectroscopy, thermogravimetric analysis, X-ray diffraction, and scanning electron microscopy. Thereafter, its capability to promote the one-pot, three-componentsynthesis of pyrimido [4,5-b] quinolone and pyrido [2,3-d] pyrimidinederivatives was evaluated. The obtained results are indicative of excellent yields and short reaction times. The biopolymer based catalyst is readily recovered
Abstract An efficient, convenient and environmentally benign one-pot multicomponent reaction for the preparation of pyrimido[4,5-b]quinolinederivatives as biologically, pharmacologically and antibacterially active products has been developed using RuCl 3 · x H 2 O as a reusable homogenous catalyst. Use of water as a green solvent, purification of products by non-chromatographic methods, reusability
摘要以RuCl 3·x H 2 O为可重复使用的均相溶液,开发了一种高效,便捷且对环境无害的单锅多组分反应法,用于制备嘧啶并[4,5-b]喹啉衍生物的生物学,药理和抗菌活性。催化剂。使用水作为绿色溶剂,通过非色谱法纯化产物,过渡金属均相催化剂的可重复使用性,通过采用多组分反应节省能源,反应时间短且产率高,是该方法的一些优点。
Fe3O4 nano-particles supported on cellulose as an efficient catalyst for the synthesis of pyrimido[4,5-b]quinolines in water
efficient heterogeneous catalyst for the synthesis of pyrimido[4,5-b]quinolines. Three-component reaction of various aromatic aldehydes, 6-amino-1,3-dimethyluracil, and dimedone or 1,3-cyclohexadione in H2O as a green solvent under reflux conditions after 2 h gave pyrimido[4,5-b]quinolines in high yields. Fe3O4 supported on cellulose was recycled in the reaction for 5 cycles without significant decrease
摘要通过原位制备Fe 3 O 4纳米颗粒并将其沉积在纤维素上,提供了负载在纤维素上的Fe 3 O 4纳米颗粒作为催化剂。经TEM和FAAS分析表征后,该催化剂用作合成嘧啶并[4,5- b ]喹啉的有效多相催化剂。各种芳香醛,6-氨基-1,3-二甲基尿嘧啶和二甲酮或1,3-环己二酮在作为绿色溶剂的H 2 O中于回流条件下在三小时后进行三组分反应,得到嘧啶基[4,5- b ]喹啉产量高。铁3 O 4 将负载在纤维素上的载体在反应中循环5个循环,而活性没有明显降低。 图形概要