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Palladium-catalyzed N1-selective allylation of indoles with allylic alcohols promoted by titanium tetraisopropoxide

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Abstract

The direct N1-selective allylation of indoles with allylic alcohols has been accomplished by synergistic functions of palladium catalysts and titanium tetraisopropoxide. The site selectivity is notably different from that observed in other related transition metal-catalyzed approaches. This chemistry provides a facile route to a variety of allylated indoles in synthetically useful yields. The utility of this simple allylation reaction was demonstrated with the first total synthesis of (+)-N-(4′-hydroxyprenyl)-cyclo(alanyltryptophyl), which was completed in five steps, starting from L-tryptophan methyl ester hydrochloride.

Graphical abstract: Palladium-catalyzed N1-selective allylation of indoles with allylic alcohols promoted by titanium tetraisopropoxide

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Publication details

The article was received on 11 Dec 2018, accepted on 28 Dec 2018 and first published on 02 Jan 2019


Article type: Communication
DOI: 10.1039/C8CC09817D
Citation: Chem. Commun., 2019, Advance Article
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    Palladium-catalyzed N1-selective allylation of indoles with allylic alcohols promoted by titanium tetraisopropoxide

    C. Chang, Y. Lin and Y. Wu, Chem. Commun., 2019, Advance Article , DOI: 10.1039/C8CC09817D

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