Issue 8, 2019

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

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

Supplementary files

Article information

Article type
Communication
Submitted
11 Dec 2018
Accepted
28 Dec 2018
First published
02 Jan 2019

Chem. Commun., 2019,55, 1116-1119

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

C. Chang, Y. Lin and Y. Wu, Chem. Commun., 2019, 55, 1116 DOI: 10.1039/C8CC09817D

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