Electrocatalytic one pot synthesis of medicinally relevant 4H-benzo[g]chromene and pyrano[2,3-g]chromene scaffold via multicomponent-domino approach
作者:Abhishek Upadhyay、Vinay K. Singh、Rahul Dubey、Narendra Kumar、L.K. Sharma、Rana Krishna Pal Singh
DOI:10.1016/j.tetlet.2017.09.048
日期:2017.11
A highly efficient one pot, multicomponent synthesis of 4H-benzo[g]chromene and pyrano[2,3-g]chromene derivatives are reported by electrochemically stimulated condensation of an aromatic aldehyde, malononitrile and some enolizable acidic compounds in ethanol at room temperature under constant current density. By utilizing common electrode materials and a simple constant current protocol, this method
通过在室温下乙醇中电化学刺激芳香醛,丙二腈和一些可烯化的酸性化合物的缩合反应,报告了一种高效的一锅多组分合成4 H-苯并[ g ] ne烯和吡喃并[2,3- g ] ne烯衍生物的方法。在恒定电流密度下。通过利用常见的电极材料和简单的恒定电流协议,该方法是常规方法的新替代方法。
Sodium Saccharin as an Effective Catalyst for Rapid One-pot Pseudo-five Component Synthesis of Dihydropyrano[ 2,3-g]chromenes under Microwave Irradiation
作者:Leila Moradi、Maryam Aghamohammad Sadegh
DOI:10.17344/acsi.2017.3417
日期:2017.6.15
One-pot microwave-assisted synthesis of dihydropyrano[2,3-g]chromenes catalyzed by sodium saccharin as an efficient, mild and green catalyst was studied. The method presented is a safe and eco-friendly approach for the multicomponent synthesis of dihydropyrano[2,3-g]chromene derivatives with many merits including short reaction times (in comparison with other reported results), high yields and easy