Expedient routes to valuable bromo-5,6-dimethoxyindole building blocks
摘要:
The synthesis of 3-, 4-, 7-bromo and 4,7-dibrominated 5,6-dihydroxyindole (DHI) and 5,6-dihydroxyindole-2-carboxylic acid (DHICA) derivatives is reported. Hemetsberger and Bartoli indole syntheses were investigated and expedient routes to the desired compounds were developed. These indoles are valuable substrates for elaboration using transition metal-mediated cross-coupling chemistry. (C) 2008 Elsevier Ltd. All rights reserved.
Synthesis of Biindolyls via Palladium-Catalyzed Reactions
作者:Hung A. Duong、Sheena Chua、Paul B. Huleatt、Christina L. L. Chai
DOI:10.1021/jo801846b
日期:2008.11.21
An unprecedented synthesis of a range of high value homo-and heterobiindolyls is presented. The one-pot Miyaura borylation and subsequent Suzuki-Miyaura coupling sequence allows for the construction of the highly sterically congested C-C bond between two bromoindoles in modest to good overall yields.