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NUCLEOPHILIC DEAROMATIZATION OF 3-NITROBENZOFURANS BY THE ACTION OF 2-(1-ARYLETHYLIDENE)MALONONITRILES

Дмитрий В. Осипов, Дарья А. Ращепкина, Алина А. Артёменко, Олег П. Демидов, Виталий А. Осянин
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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.

 


Keywords


2-(1-arylethylidene)malononitriles; 1,1-dicyanopenta-2,4-dien-1-ide anion; 3-nitrobenzofurans; Michael reaction; nucleophilic dearomatization.

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