The role of a Lewis acid in the Nenitzescu indole synthesis
作者:Valeriya S. Velezheva、Andrey I. Sokolov、Albert G. Kornienko、Konstantin A. Lyssenko、Yulia V. Nelyubina、Ivan A. Godovikov、Alexander S. Peregudov、Andrey F. Mironov
DOI:10.1016/j.tetlet.2008.09.087
日期:2008.12
A highly efficient Lewis acid-catalyzed method for the Nenitzescusynthesis of 5-hydroxyindoles with a range of substituents at N-1 and C-3 and symmetric 5,5′-dihydroxydiindoles has been developed. The amount of the catalyst (10–100 mol %) required depended on the nature of the enaminone component. It has been shown that Lewis acid plays a role in enaminone component activation through an enamine-ZnC12