Substrate-Controlled [5+1] Annulation of 5-Amino-1<i>H</i>
-phenylpyrazoles with Alkenes: Divergent Synthesis of Multisubstituted 4,5-Dihydropyrazolo[1,5-<i>a</i>
]quinazolines
作者:Xunyuan Jiang、Xiaoyi Wei、Fei Lin、Zhixiang Zhang、Guangkai Yao、Shuai Yang、Weijing Zhao、Chen Zhao、Hanhong Xu
DOI:10.1002/ejoc.202000536
日期:2020.7.15
With C=C double bonds as one‐carbon synthons, an efficient [5+1] hetero‐annulation of 5‐amino‐1H‐phenylpyrazoles with electron‐deficient olefinic esters was developed, allowing the first and divergent synthesis of 5,5‐disubstituted 4,5‐dihydropyrazolo[1,5‐a ]quinazolines.
使用C = C双键作为一碳合成子,开发了一种5-氨基-1 H-苯基吡唑与缺电子的烯属酯的有效[5 + 1]杂环,从而首次合成5,5 -双取代4,5-二氢吡唑并[1,5- a ]喹唑啉。