超声辅助柠檬酸三钠二水合物催化的绿色方案,可在环境条件下高效单反应合成取代的铬诺[3',4':5,6]吡喃并[2,3- d ]嘧啶
摘要:
基于低成本开发了一系列药学上有趣的功能化铬诺[3',4':5,6]吡喃并[2,3- d ]嘧啶的简单,直接,高效的多组分一锅合成方法在环境条件下,通过4-羟基香豆素,芳族醛和巴比妥酸/硫代巴比妥酸的超声辅助串联反应,对环境无害的柠檬酸三钠三水合物催化剂进行反应。无金属合成,高原子经济性,良好或优异的产率,短的反应时间,操作简便,生态友好和温和的反应条件是他方案的一些重要特征。
Electrogenerated acetonitrile anions/tetrabutylammonium cations: an effective catalytic system for the synthesis of novel chromeno[3′,4′:5,6]pyrano[2,3-d]pyrimidines
synthesis of novel chromeno[3′,4′:5,6]pyrano[2,3-d]pyrimidines is described, using the electrogenerated anion of acetonitrile as the base in the presence of tetrabutylammonium fluoride as an effective supporting electrolyte in a one-pot, three-component condensation of barbituric acid, an aromatic aldehyde or isatin, and 4-hydroxycoumarin. The reaction is carried out in an undivided cell containing
描述了一种有效且方便的合成新型铬诺[3',4':5,6]吡喃并[2,3- d ]嘧啶的方法,该方法以乙腈的电生成阴离子为基础,在氟化四丁基铵的情况下作为有效载体一锅,三组分巴比妥酸,芳族醛或靛红与4-羟基香豆素的缩合反应中的电解质。该反应在室温下以恒定电流在包含铁电极作为阴极和Pt电极作为阳极的不分隔电池中进行。
Ultrasound-assisted and trisodium citrate dihydrate-catalyzed green protocol for efficient and one-pot synthesis of substituted chromeno[3′,4′:5,6]pyrano[2,3-d]pyrimidines at ambient conditions
作者:Goutam Brahmachari、Khondekar Nurjamal
DOI:10.1016/j.tetlet.2019.06.028
日期:2019.7
A simple, straightforward, and highly efficient multicomponent one-pot synthesis of a series of pharmaceutically interesting functionalized chromeno[3′,4′:5,6]pyrano[2,3-d]pyrimidines has been developed based on a low-cost and environmentallybenign trisodium citrate dihydrate catalyst via ultrasound-assisted tandem reactions of 4-hydroxycoumarin, aromatic aldehydes, and barbituric acid/thiobarbituric
基于低成本开发了一系列药学上有趣的功能化铬诺[3',4':5,6]吡喃并[2,3- d ]嘧啶的简单,直接,高效的多组分一锅合成方法在环境条件下,通过4-羟基香豆素,芳族醛和巴比妥酸/硫代巴比妥酸的超声辅助串联反应,对环境无害的柠檬酸三钠三水合物催化剂进行反应。无金属合成,高原子经济性,良好或优异的产率,短的反应时间,操作简便,生态友好和温和的反应条件是他方案的一些重要特征。