An Efficient and Environmentally Friendly Procedure for the Synthesis of Some Novel 8-Benzylidene-4-phenyl-3,4,5,6,7,8-hexahydro-1H-quinazolin-2-ones/thiones using Tetrabutylammonium Hexatungstate as a Reusable Heterogeneous Catalyst under Solvent-Free Conditions
作者:Majid Ghashang、Syed Sheik Mansoor、Krishnamoorthy Aswin
DOI:10.5012/bkcs.2013.34.11.3289
日期:2013.11.20
An efficient method for the preparation of 8-benzylidene-4-phenyl-3,4,5,6,7,8-hexahydro-1H-quinazolin-2ones/thiones from the reaction of aromatic aldehydes with cyclohexanone and urea or thiourea in the presence of Tetrabutylammonium hexatungstate, [TBA]2[W6O19], as an efficient, inexpensive catalyst under thermal and solvent-free conditions has been developed. Good yields, short reaction times, straightforward
芳香醛与环己酮与脲或硫脲反应制备8-亚苄基-4-苯基-3,4,5,6,7,8-六氢-1H-喹唑啉-2酮/硫酮的有效方法已经开发出在热和无溶剂条件下存在四丁基六钨酸铵 [TBA]2[W6O19] 作为一种高效、廉价的催化剂。产率高、反应时间短、后处理简单、催化剂的可重复使用性和绿色条件是该过程最明显的优势。