NUCLEOPHILIC DEAROMATIZATION OF 3-NITROBENZOFURANS BY THE ACTION OF 2-(1-ARYLETHYLIDENE)MALONONITRILES
DOI:
https://doi.org/10.1007/6275Keywords:
2-(1-arylethylidene)malononitriles, 1, 1-dicyanopenta-2, 4-dien-1-ide anion, 3-nitrobenzofurans, Michael reaction, nucleophilic dearomatization.Abstract
When 2-(1-arylethylidene)malononitriles act upon 3-nitrobenzofurans in the presence of triethylamine, the furan ring opens and triethylammonium 2-aryl-1,1-dicyano-5-nitropenta-2,4-dien-1-ides are formed. The obtained salts containing the chromophoric 1,1-dicyanopentadienide fragment are of interest as anionic polymethine dyes.