Efficient one-pot synthesis of 2,3-dihydroquinazolin-4(1H)-ones from aromatic aldehydes and their one-pot oxidation to quinazolin-4(3H)-ones catalyzed by Bi(NO3)3·5H2O: Investigating the role of the catalyst
作者:Iraj Mohammadpoor-Baltork、Ahmad R. Khosropour、Majid Moghadam、Shahram Tangestaninejad、Valiollah Mirkhani、Saeid Baghersad、Arsalan Mirjafari
DOI:10.1016/j.crci.2011.05.003
日期:2011.10
three-component reaction of isatoic anhydride, primary amines and aromatic aldehydes catalyzed by Bi(NO 3 ) 3 ·5H 2 O under solvent-free conditions is described. Oxidation of these 2,3-dihydroquinazolin-4(1 H )-ones to their quinazolin-4(3 H )-ones was also successfully performed in the presence of Bi(NO 3 ) 3 ·5H 2 O. This new method has the advantages of convenient manipulation, short reaction times, excellent
摘要 在 Bi(NO 3 ) 催化下,通过靛红酸酐、伯胺和芳香醛的一锅三组分反应高效、新颖地合成 2,3-二取代的 2,3-二氢喹唑啉-4(1 H )-酮描述了在无溶剂条件下的 3 ·5H 2 O。在 Bi(NO 3 ) 3 ·5H 2 O 存在下,这些 2,3-二氢喹唑啉-4(1 H )-酮也被成功地氧化为它们的喹唑啉-4(3 H )-酮。这种新方法具有操作方便、反应时间短、收率高、后处理非常容易,以及使用市售、低成本和相对无毒的催化剂等优点。还研究了 Bi(NO 3 ) 3 ·5H 2 O 在这些转化中的作用。