Copper(<scp>ii</scp>)-catalyzed and acid-promoted highly regioselective oxidation of tautomerizable C(sp<sup>3</sup>)–H bonds adjacent to 3,4-dihydroisoquinolines using air (O<sub>2</sub>) as a clean oxidant
作者:Yun-Gang He、Yong-Kang Huang、Qi-Qi Fan、Bo Zheng、Yong-Qiang Luo、Xing-Liang Zhu、Xiao-Xin Shi
DOI:10.1039/d1ra05671a
日期:——
1-Bn-DHIQs to 1-Bz-DHIQs without concomitant excessive oxidation of 1-Bz-DHIQs to 1-Bz-IQs is very important for the syntheses of 1-Bz-DHIQ alkaloids and analogues. In this article, we developed a novel Cu(ii)-catalyzed and acid-promoted highly regioselective oxidation of tautomerizable C(sp3)-H bonds adjacent to the C-1 positions of various 1-Bn-DHIQs. It was observed that when 0.2 equiv. of Cu(OAc)2·2H2O