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.
通过Sonagashira耦合将o-溴苯甲酸酯与2-(2′-硝基苯)乙炔反应得到的2-(2′-硝基苯乙炔)苯甲酸酯,经过相应的2-硝基苯-1,3-茚二酮的两步反应序列转化为 indenо[1,2-b]indoles。