Difunctionalization of the C–N Bond through <i>tert</i>-Butylnitrite-Initiated C–N Cleavage of 1,2,3,4-Tetrahydroisoquinolines and <i>N</i>,<i>N</i>′-Diarylimidazolidines under Transition-Metal-Free Conditions
作者:Zheng Sun、Honghe Ji、Yu Shao、Kaixuan He、Yuxian Zhang、Yu Yuan、Xiaodong Jia
DOI:10.1021/acs.joc.9b01560
日期:2019.10.4
Difunctionalization of the saturated C-N bond of 1,2,3,4-tetrahydroisoquinolines and N,N'-diarylimidazolidines was achieved using TBN as the metal-free initiator, providing a series N-nitrosoaminoaldehydes in high yields. Mechanistic study shows that the TBN-derived tBuO radical initiated the sp3 C-H bond activation, and the C-N bond cleavage was mediated by an iminium intermediate. This reaction provided
使用TBN作为无金属引发剂,可以实现1,2,3,4-四氢异喹啉和N,N'-二芳基咪唑烷的饱和CN键的双官能化,从而高收率提供了一系列N-亚硝基氨基醛。机理研究表明,TBN衍生的tBuO自由基引发了sp3 CH键的活化,CN键的裂解是由亚胺中间体介导的。该反应提供了在温和且无金属的条件下裂解惰性CN键的新方法,通过CN键的双官能化实现了分子复杂性的构建。