Reaction of 4-(diethylamino)salicylaldehyde with malononitrile was written by Tkach, I. I.;Reznichenko, A. V.;Luk’yanets, E. A.. And the article was included in Khimiya Geterotsiklicheskikh Soedinenii in 1992.Name: 7-(Diethylamino)-2-oxo-2H-chromene-3-carbonitrile This article mentions the following:
Treating 4-(diethylamino)salicylaldehyde (I) with CH2(CN)2 in AcOH gave 27% coumarin derivative II and 6.2% coumarin III; in polyphosphoric acid 53% amide IV was obtained; and in Ac2O 49% dicyanovinyl derivative V was obtained. Addnl. obtained were thione VI and benzopyranonaphthyridines VII (R = H, Et). In the experiment, the researchers used many compounds, for example, 7-(Diethylamino)-2-oxo-2H-chromene-3-carbonitrile (cas: 51473-74-6Name: 7-(Diethylamino)-2-oxo-2H-chromene-3-carbonitrile).
7-(Diethylamino)-2-oxo-2H-chromene-3-carbonitrile (cas: 51473-74-6) belongs to nitriles. There has been no report on the microbial biosynthesis of nitriles and the physiological function of such enzymes, nor was it not even known whether aliphatic and aromatic nitriles are biological compounds or just petrochemicals. Some nitriles are manufactured by heating carboxylic acids with ammonia in the presence of catalysts. This process is used to make nitriles from natural fats and oils, the products being used as softening agents in synthetic rubbers, plastics, and textiles and for making amines.Name: 7-(Diethylamino)-2-oxo-2H-chromene-3-carbonitrile
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts