A new, simple, efficient synthesis of benzo[b]carbazoles and indeno[1,2-b]indoles
作者:Juan C. Estévez、Ramón J. Estévez、Luis Castedo
DOI:10.1016/0040-4039(93)85075-8
日期:1993.10
A new, efficient synthesis of benzo[b]carbazoles and indeno[1,2-b]indoles from nitrophenylacetylphenylacetic acids and nitrobenzylphthalides respectively is described.
Nitro-facilitated ‘5-Exo-dig’ Intramolecular Cyclisation of 2-(2-Nitrophenylethynyl)benzoic Acids: A New Total Synthesis of Indeno[1,2-b]indoles
作者:Francisco J. Reboredo、Mónica Treus、Juan C. Estévez、Luis Castedo、Ramón J. Estévez
DOI:10.1055/s-2002-31896
日期:——
2-(2′-Nitrophenylethynyl)benzoic acid esters, obtained by Sonagashira coupling of o-bromobenzoates to 2-(2′-nitrophenyl)acetylenes, were converted into indeno[1,2-b]indoles by a two-step sequence, through the corresponding 2-nitrophenyl-1,3-indandiones.