Synthesis of indoles from aroyloxycarbamates with alkynes <i>via</i> decarboxylation/cyclization
作者:Nuannuan Ma、Peihe Li、Zheng Wang、Qipu Dai、Changwen Hu
DOI:10.1039/c8ob00086g
日期:——
decarboxylation/cyclization of aroyloxycarbamates to realize substituted indoles has been disclosed. Terminal alkynes as the coupling partners lead to site specific 2-substitutedindoles through two pathways, while internal alkynes with aroyloxycarbamates can be transformed to 2,3-disubstituted indoles directly. This protocol is further demonstrated by the efficient synthesis of indoles as well as the
Potassium [1-(tert-butoxycarbonyl)-1H-indol-2-yl]trifluoroborate (1) was used in Suzuki-type coupling reactions. First, the best coupling conditions were assessed using bromobenzene as the electrophile. Then, 1 was successfully coupled with various aryl and hetaryl bromides. Finally, the reactivity of 1 towards coupling partners other than bromide derivatives was evaluated. Suzuki coupling - organotrifluoroborates