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.
Expedient routes to valuable bromo-5,6-dimethoxyindole building blocks
作者:Paul B. Huleatt、Sze Shiong Choo、Sheena Chua、Christina L.L. Chai
DOI:10.1016/j.tetlet.2008.06.080
日期:2008.9
The synthesis of 3-, 4-, 7-bromo and 4,7-dibrominated 5,6-dihydroxyindole (DHI) and 5,6-dihydroxyindole-2-carboxylic acid (DHICA) derivatives is reported. Hemetsberger and Bartoli indole syntheses were investigated and expedient routes to the desired compounds were developed. These indoles are valuable substrates for elaboration using transition metal-mediated cross-coupling chemistry. (C) 2008 Elsevier Ltd. All rights reserved.
SYSTEMS AND METHODS FOR PRODUCTION OF ARTIFICIAL EUMELANIN
申请人:THE BOARD OF REGENTS FOR OKLAHOMA STATE UNIVERSITY
公开号:US20170174825A1
公开(公告)日:2017-06-22
“Black” photoactive materials that comprise synthetic eumelanin polymers are provided, as are methods of making and using the polymers. The synthetic eumelanin polymers are made from the plant oil vanillin, and exhibit defined structural and chemical characteristics (e.g. homogeneity, solubility, etc.) that make them suitable for use in devices that require photoactive materials, such as solar cells.