A New Biginelli Reaction Procedure Using Potassium Hydrogen Sulfate as the Promoter for an Efficient Synthesis of 3,4-Dihydropyrimidin-2(1<i>H</i>)-one
conditions have been found to carry out the Biginellireaction for the synthesis of 3,4-dihydropyrimidin-2(1H)-one derivatives. This synthesis was performed usingpotassiumhydrogensulfate as the promoter in glycol solution. Compared with the classical Biginellireaction conditions, this new method has the advantage of excellent yields (85-99%) and short reaction time (0.5-2 h).
One-pot Synthesis of Octahydroqinazolinones Derivatives Catalyzed by [C<sub>4</sub>(mim)<sub>2</sub>](FeCl<sub>4</sub>)<sub>2</sub>under Solvent Free Conditions
作者:Bijan Mombani Godajdar、Soghra Soleimani
DOI:10.1002/jccs.201300358
日期:2014.4
In this investigation, a practical green chemistry procedure for synthesis of octahydroqinazolinones and thiones derivatives via condensation of aldehyde, 1,3‐cyclohexanedione/dimedone and urea or thiourea catalyzed by magnetic roomtemperature dicationic liquid undersolventfreeconditions is described. The catalyst was studied by UV spectroscopy, vibrating sample magnetometer, and thermogravimetric
1-Methylimidazolium hydrogen sulfate/chlorotrimethylsilane: An effective catalytic system for the synthesis of 3,4-dihydropyrimidin-2(1H)-ones and hydroquinazoline-2,5-diones
Brønsted acidic ionicliquid, 1-methylimidazolium hydrogen sulfate, in the presence of catalytic amount of chlorotrimethylsilane has been used as an efficient and reusablecatalyst for the one-potsynthesis of 3,4-dihydropyrimidin-2(1H)-ones and hydroquinazoline-2,5-diones under thermal and solvent-free conditions. High yields of the products were obtained in a few minutes by using this new catalysis
A new biginelli reaction procedure using potassium hydrogen sulfate as the promoter for an efficient synthesis of 3,4-dihydropyrimidin-2(1<i>H</i>)-one
conditions have been found to carry out the Biginellireaction for the synthesis of 3,4-dihydropyrimidin-2(1H)-one derivatives. This synthesis was performed usingpotassiumhydrogensulfate as the promoter in ethylene glycol solution. Compared with the classical Biginellireaction conditions, this new method has the advantage of excellent yields (85–95%) and short reaction time (0.5–2 h).
A Practical Approach Towards Synthesis of Octahydroquinazolinone Derivatives in Water
作者:Hai-Xia Lin、Xiao-Zhen Xie、Xiao-Hong Wang、Bin He
DOI:10.2174/157017809789869555
日期:2009.10.1
A simple, efficient and green procedure has been developed for the synthesis of octahydroquinazolinone derivatives by Biginelli-type three-component cyclocondensation reactions of cyclic β-diketones, aldehydes and (thio)urea with p-TsOH catalysis in water.