Metal Cocatalyzed Tandem Alkynylative Cyclization Reaction of in Situ Formed<i>N</i>-Iminoisoquinolinium Ylides with Bromoalkynes via C–H Bond Activation
作者:Ping Huang、Qin Yang、Zhiyuan Chen、Qiuping Ding、Jingshi Xu、Yiyuan Peng
DOI:10.1021/jo3013429
日期:2012.9.21
Silver triflate and copper(I) iodide cocatalyzed direct alkynylation and cyclization reaction of in situ formed N-iminoisoquinolinium ylides with bromoalkynes is described. The reaction proceeds efficiently through a combination of C–H activation and subsequent tandem reaction in one pot, leading to diverse H-pyrazolo[5,1-a]isoquinolines in good yields under mild reaction conditions.
描述了三氟甲磺酸银和碘化铜(I)共同催化原位形成的N-亚氨基异喹啉鎓碘化物与溴炔烃的直接炔基化和环化反应。在一个反应釜中,通过C–H活化和随后的串联反应的组合,该反应得以有效进行,从而在温和的反应条件下以高收率产生了多种H-吡唑并[5,1- a ]异喹啉。