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
A One-pot, Efficient Synthesis of Polyfunctionalized Pyrido[2,3-<i>d</i>]pyrimidines and Uncyclized Adducts by Aldehydes, 1,3-Dicarbonyl Compounds, and 6-Aminouracils
作者:Guo-ping Lu、Chun Cai
DOI:10.1002/jhet.1704
日期:2014.11
A one‐pot, efficient protocol for the synthesis of polyfunctionalizedpyrido[2,3‐d]pyrimidines and uncyclizedadducts by 6‐aminouracils in poly(ethylene glycol) 200/H2O or AcOH was described. An interesting family of pyrido[2,3‐d]pyrimidines and uncyclizedadducts bearing fused pharmacological active units are prepared. The reaction is free of toxic solvents and catalysts, has simple workup procedure
描述了一种在6-乙二醇尿嘧啶在聚(乙二醇)200 / H 2 O或AcOH中由6-氨基尿嘧啶合成多官能化吡啶并[2,3- d ]嘧啶和未环化加合物的有效方法。制备了一个有趣的吡啶并[2,3- d ]嘧啶家族和带有稠合药理活性单元的未环加合物。该反应不含有毒溶剂和催化剂,后处理步骤简单,原子经济性高,使其更环保,适合大规模操作。
Agar-entrapped sulfonated DABCO: Agelly acidic catalyst for the acceleration of one-pot synthesis of 1,2,4-triazoloquinazolinone and some pyrimidine derivatives
After preparation and identification this new reagent is used as an efficient and environmentally safe catalyst for the preparation of 1, 2, 4-triazoloquinazolinone and somepyrimidinederivatives. This method is accompanied with some superiorities such as, simple operation, mild and green conditions, use of low cost and non-hazardous natural material, short reaction times, easy preparation methods and
Three-Component Green Reaction of Arylaldehydes, 6-Amino-1,3- Dimethyluracil and Active Methylene Compounds Catalyzed by Zr(HSO4)4 Under Solvent-Free Conditions
A convenient one-pot, three-component reaction of aromatic aldehydes, 6-amino-1,3-dimethyluracil and active methylene compounds in the presence of Zr(HSO4)4 as a heterogeneous catalyst, under solvent-free conditions brings a very simple and highly efficient method for the preparation of pyrimido[4,5-b]quinolines, pyrimido[5',4':5,6]pyrido[2,3- d]pyrimidines, indeno[2',1':5,6]pyrido[2,3-d]pyrimidines
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