Csp2–Csp2 bond formation via Lewis acid/ammonium salt cocatalyzed tandem addition and oxidative dehydrogenation strategy: alkenylation of indoles with α,β-unsaturated ketones
摘要:
The alkenylation of indoles with alpha,beta-unsaturated ketones through a tandem addition and oxidative dehydrogenation strategy has been developed. This method provides an alternative approach for C3 alkenylation of indoles with alpha,beta-unsaturated ketones. Using inexpensive and readily available BF3 center dot Et2O and an ammonium salt as the efficient cocatalyst constitutes the attractive advantage of this reaction. (C) 2012 Published by Elsevier Ltd.
An efficient and general protocol is described for the Michaeladdition of α,β-unsaturated ketones with electron-rich arenes/indoles to give alkylated arenes/indoles under mild reaction condition at room temperature. Shorter reaction time, convenient and good isolated yields are the significant features of this protocol. Moreover, the procedure is environmentally benign in nature and applicable to
Copper-Catalyzed Synthesis of 2-Aminocarbazoles through Cascade C-C and C-N Bond Formation and Aromatization
作者:Xinlei Liu、Jiangkun Huang、Huibei Xu、Dandan Zhang、Qiu Sun、Ling He
DOI:10.1002/ejoc.201801297
日期:2019.2.7
The one‐pot synthesis of 2‐aminocarbanoles from 1‐(1H‐indole‐3‐yl)pentan‐3‐one through cascade C–C/C–N bond formation using ammonium carbonate as a nitrogen source and copper salt as a catalysis is reported.