Concise, efficient and practical assembly of bromo-5, 6-dimethoxyindole building blocks

PB Huleatt, J Lau, S Chua, YL Tan, HA Duong…

Index: Huleatt, Paul B.; Lau, Jacelyn; Chua, Sheena; Tan, Yun Lei; Duong, Hung Anh; Chai, Christina L.L. Tetrahedron Letters, 2011 , vol. 52, # 12 p. 1339 - 1342

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Citation Number: 8

Abstract

A concise, efficient and simple route to a series of bromoindole building blocks is described. The synthetic routes are highlighted by purification-free preparation of o-nitrocinnamate intermediates and clean, modified Cadogan indole syntheses. The scope of this indole synthesis has been explored and expanded through the use of a range of solvents and easily removable phosphine reagents.