Synthesis of Pyrazolo[1,5-<i>c</i>]quinazoline Derivatives through Copper-Catalyzed Tandem Reaction of 5-(2-Bromoaryl)-1<i>H</i>-pyrazoles with Carbonyl Compounds and Aqueous Ammonia
作者:Shenghai Guo、Jiliang Wang、Xuesen Fan、Xinying Zhang、Dongqiang Guo
DOI:10.1021/jo4001756
日期:2013.4.5
A practical and efficient synthesis of pyrazolo[1,5-c]quinazolines and 5,6-dihydropyrazolo[1,5-c]quinazolines, including several spiro compounds, through copper-catalyzed tandem reaction of 5-(2-bromoaryl)-1H-pyrazoles with carbonyl compounds and aqueous ammonia under air has been developed. Compared with literature methods toward pyrazolo[1,5-c]quinazoline derivatives, the synthetic method reported
通过铜催化的5-(2-溴芳基)-串联反应,实用高效地合成吡唑并[1,5- c ]喹唑啉和5,6-二氢吡唑并[1,5 - c ]喹唑啉,包括几种螺环化合物。已开发出在空气中具有羰基化合物和氨水的1 H-吡唑。与有关吡唑并[1,5- c ]喹唑啉衍生物的文献方法相比,本文报道的合成方法具有容易获得和廉价的起始原料和试剂,底物范围广,反应条件温和的优点。