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Synthesis of polyhydroquinoline derivatives via a four-component Hantzsch condensation catalyzed by tin dioxide nanoparticles（图）
Nano tin dioxide catalyst Hantzsch condensation Polyhydroquinoline 1,4-Dihydropyridine
2013/9/27
Tin dioxide (SnO2) nanoparticles efficiently catalyzed unsymmetrical four-component Hantzsch condensations of various aldehydes, dimedone, ethyl acetoacetate, and ammonium acetate to form polyhydroqui...
One-Pot Four-Component Dakin-West Synthesis of β-Acetamido Ketones Catalyzed by a Vanadium-Substituted Heteropolyacid （图）
homogeneous catalysis heteropolyacid Keggin Wells-Dawson Dakin-West β-acetamido ketone
2013/10/7
The multicomponent condensation of an aryl aldehyde, acetyl chloride, acetonitrile, and enolizable ketone as one-pot synthesis of β-acetamido ketones in high yields was investigated using commercial, ...
Cobalt Nanoparticles Promoted Highly Efficient One Pot Four-Component Synthesis of 1,4-Dihydropyridines under Solvent-Free Conditions（图）
cobalt nanoparticle 1,4-dihydropyridine four-component condensation heterogeneou catalyst magnetically separable catalyst
2013/10/10
A straightforward and general method has been developed for the synthesis of C5-unsubstitiuted 1,4-dihydropyridines by a reaction using dimedone, acetophenone, aromatic aldehydes, and ammonium acetate...
Determination of Four Active Ingredients in Vc Yinqiao Tablets by Capillary Zone Electrophoresis with Amperometric Detection†
毛细管电泳 安培检测 对乙酰氨基酚 维生素 绿原酸 咖啡酸
2007/12/20
摘要 首次用毛细管电泳－安培检测法分别测定了复方中成药维C银翘片中对乙酰氨基酚（paracetamol），维生素C（vitamin C），绿原酸 (chlorogenicacid) 和咖啡酸(caffeic acid)。探讨了电极电位、运行缓冲溶液、分离电压及进样时间等对毛细管电泳分离-安培检测的影响,得到了较为优化的测定条件。在最佳毛细管电泳分离条件和安培检测条件下，四种物质可在22 min内达...