A pragmatic and swift method for the synthesis of Benzo[a]pyrano[2,3-c]phenazine derivatives via one pot, multicomponent strategy by employing β-cyclodextrin in EtOH:H2O (1:1) solvent at 70 °C has been documented here. Utilization of supramolecular catalyst β-cyclodextrin which is highly efficient, green, biodegradable and reusable catalyst augments the synthesis amazingly, is the key feature of the
Résumé An efficient one-pot quantitative procedure for the preparation of functionalized benzo[a]pyrano[2,3-c]phenazine derivatives from four-component reaction of 2-hydroxynaphthalene-1,4-dione, o-phenylenediamine, aldehydes, and malononitrile in the presence of nano CuO as the catalyst has been developed. The copper(II) oxide nanoparticles can be recovered and reused several times without loss of its activity.
An efficient four-component domino protocol for the rapid and green synthesis of functionalized benzo[a]pyrano[2,3-c]phenazine derivatives using caffeine as a homogeneous catalyst
A one-pot, two-step procedure has been used to synthesize functionalized benzo[a]pyrano[2,3-c]phenazine derivatives from a four-component condensation reaction of 2-hydroxynaphthalene-1,4-dione, o-phenylenediamine, aldehydes, and malononitrile in the presence of 1,3,7-trimethylpurine-2,6-dione (caffeine) as an expedient and reusable solid base catalyst. This new procedure has the following advantages: operational simplicity, short reaction times, environmentally friendly, easy work-up, and all the products were obtained in excellent yields.
Theophylline as a new and green catalyst for the one-pot synthesis of spiro[benzo[ a ]pyrano[2,3- c ]phenazine] and benzo[ a ]pyrano[2,3- c ]phenazine derivatives under solvent-free conditions
A green, convenient, high yielding and one-pot procedure for the synthesis of novel spiro[benzo[a]pyrano[2,3-c]phenazine] derivatives by domino multi-component condensation reaction between 2-hydroxynaphthalene-1,4-dione, benzene-1,2-diamines, ninhydrine, and malononitrile in the presence of a catalytic amount of 1,3-dimethyl-7H-purine-2,6-dione (theophylline) as an expedient, eco-friendly and reusable
Chitosan-attached nano-Fe<sub>3</sub>O<sub>4</sub> as a superior and retrievable heterogeneous catalyst for the synthesis of benzopyranophenazines using chitosan-attached nano-Fe<sub>3</sub>O<sub>4</sub>
involving a one-pot four-component reaction of hydroxynaphthoquinone, o-phenylenediamine, benzaldehydes, and malononitrile with nano-Fe3O4@chitosan as an efficientheterogeneous solid acid catalyst under reflux conditions in ethanol. The catalyst is characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), magnetic susceptibility measurements, energy-dispersive X-ray spectroscopy
摘要 提出了一种简单快速的制备苯并吡喃吩嗪的方法,涉及羟基萘醌、邻苯二胺、苯甲醛和丙二腈与纳米Fe3O4@壳聚糖作为高效多相固体酸催化剂在回流条件下的一锅四组分反应。在乙醇中。该催化剂通过粉末 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、磁化率测量、能量色散 X 射线光谱 (EDS) 和傅里叶变换红外 (FT-IR) 光谱表征。原子经济性、催化活性高、产物范围广、反应时间短、收率高、催化剂负载量低是该方法的一些重要特征。