Concise, efficient and practical assembly of bromo-5,6-dimethoxyindole building blocks
作者:Paul B. Huleatt、Jacelyn Lau、Sheena Chua、Yun Lei Tan、Hung Anh Duong、Christina L.L. Chai
DOI:10.1016/j.tetlet.2011.01.076
日期:2011.3
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.