通过铜催化的5-(2-溴芳基)-1 H-吡唑与羰基化合物和氨水的串联反应合成吡唑并[1,5- c ]喹唑啉衍生物
摘要:
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。
An Efficient Protocol for the Synthesis of Pyrazolo[1,5-c]quinazolines by a Staudinger–Aza-Wittig–Dehydroaromatization Sequence
作者:Zhilin Ren、Ping He、Mingxian Xu、An Chen、Jiying Qiu、Mingming Zu、Yi Zhang、Jiayi Wang
DOI:10.1055/a-1579-1692
日期:2021.11
The one-pot synthesis of azide-substituted dihydropyrazoles in isopropanol was performed by using chalcones, hydrazine hydrate, and an acyl chloride at 0 ℃. Subsequent Staudinger–aza-Wittig–dehydroaromatization reactions of the products with methyl(diphenyl)phosphine were also investigated for further application in the construction of pyrazolo[1,5-c]quinazolines.