Dawson Heteropolyacid: A Green, Eco-Friendly, and Reusable Catalyst for One-Pot Synthesis of 4-Aminoquinazolines
作者:Fatemeh F. Bamoharram、Majid M. Heravi、Mina Roshani、Katayon Kosari
DOI:10.1080/15533174.2012.741181
日期:2013.1.1
A new multicomponent synthesis of 4-aminoquinazolines from the reaction of anthranilonitrile, acylchlorides, and ammonium acetate in the presence of catalytic amounts of Dawson-type heteropolyacids (HPAs) is reported. The catalytic performance of different forms of Dawson-type HPAs, H6 P2M18O62 (M = WVI, MoVI) and mixed addenda forms (M = CoII, CuII, NiII, MnIII) were compared and in all cases, maximum
据报道,在催化量的道森型杂多酸(HPA)存在下,由蒽腈,酰氯和乙酸铵反应可合成4-氨基喹唑啉的新的多组分合成方法。比较了不同形式的Dawson型HPA,H 6 P 2 M 18 O 62(M = W VI,Mo VI)和混合的附加形式(M = Co II,Cu II,Ni II,Mn III)的催化性能。在所有情况下,使用H 6 P 2 W 18 O 62均可观察到最大产量作为催化剂。估计了合理的机制。在所有情况下,Dawson催化剂都易于回收和循环利用,并保持其初始结构和活性。研究了反应条件的影响,结果表明反应收率良好。