Nanostructured coumarin-based cobalt complex as an efficient, heterogeneous and recyclable catalyst for the three-component synthesis of benzo[b]pyran and 3,4-dihydropyrano[c]chromene derivatives
作者:Hashem Sharghi、Seyyede Faeze Razavi、Mahdi Aberi、Fatemeh Sabzalizadeh、Hamid Reza Karbalaei-Heidari
DOI:10.1007/s13738-020-02136-1
日期:2021.7
compounds (dimedon, 4-hydroxy coumarin and 1,3-cyclohexadion) with malononitrile and aryl aldehydes in aqueous media (H2O:EtOH) as a solvent with short reaction time for the synthesis of benzo[b]pyran and 3,4- dihydropyrano[c]chromane derivatives by using nanostructured coumarin-based cobalt complex as an efficient heterogeneous catalyst. The salient features of this new protocol include simple procedure
摘要 改进的一锅三组分羰基化合物(二甲双胍,4-羟基香豆素和1,3-环己二酮)与丙二腈和芳醛在水性介质(H 2 O:EtOH)中作为溶剂的反应,反应时间短。苯并[ b ]吡喃和3,4-二氢吡喃[ c的合成通过使用纳米结构的香豆素基钴配合物作为有效的非均相催化剂,可制得[] ane烷衍生物。该新方案的显着特征包括操作简单,产率高,无需柱色谱法即可轻松分离产物和缩短反应时间。另外,通过添加EtOH回收了纳米催化剂,并重复使用了五次而其催化活性没有明显损失。通过DNA切割能力测定和真核细胞毒性测定进行复合物的生物影响评估。尽管该复合物在氧化条件下显示单链DNA断裂,但由于对细胞进入的限制,其高极性性质显示出细胞毒性数据的显着下降。 图形摘要