Synthesis of Carbazolequinones by Formal [3 + 2] Cycloaddition of Arynes and 2-Aminoquinones
作者:Jian Guo、I. N. Chaithanya Kiran、R. Santhosh Reddy、Jiangsheng Gao、Meiqiong Tang、Yuyin Liu、Yun He
DOI:10.1021/acs.orglett.6b01090
日期:2016.5.20
A formal cycloaddition reaction for the synthesis of biologically and pharmaceutically important carbazolequinones via the annulation of aminoquinones with arynes has been developed. This practical and metal-free cascade reaction proceeds through successive C–C/C–N bond formations. Moreover, this novel method has been utilized for the concise synthesis of bioactive murrayaquinone A and koeniginequinone
Ruthenium(II)‐Catalyzed Double Annulation of Quinones: Step‐Economical Access to Valuable Bioactive Compounds
作者:Eufrânio N. Silva Júnior、Renato L. Carvalho、Renata G. Almeida、Luisa G. Rosa、Felipe Fantuzzi、Torben Rogge、Pedro M. S. Costa、Claudia Pessoa、Claus Jacob、Lutz Ackermann
DOI:10.1002/chem.202001434
日期:2020.8.26
Double ruthenium(II)‐catalyzed alkyne annulations of quinones were accomplished. Thus, a strategy is reported that provides step‐economical access to valuable quinones with a wide range of applications. C−H/N−H activations for alkyne annulations of naphthoquinones provided challenging polycyclic quinoidal compounds by forming four new bonds in one step. The singular power of the thus‐obtained compounds