Dissociative ionization of 7-dialkylaminocoumarins under electron impact was written by Gorozhankin, S. K.;Kirpichenok, M. A.;Klyuev, N. A.;Zhil’nikov, V. G.. And the article was included in Izvestiya Timiryazevskoi Sel’skokhozyaistvennoi Akademii in 1987.Quality Control of 7-(Diethylamino)-2-oxo-2H-chromene-3-carbonitrile This article mentions the following:
The behavior of 19 substituted 7-aminocoumarins, eg, I (R = OEt, CF3, R1 = H; R = Me, R1 = thiocyanato; R = CF3, R1 = cyano), II (R = Ac, R1 = H; R = H, R1 = Cl), and III (R = Me, R1 = H, CH2CO2Et; R = H, R1 = CO2 Et; R = CF3, R1 = H), under electron impact mass spectroscopic conditions was studied. The pyrone ring in I–III was more stable to degradation than in other coumarins. In the experiment, the researchers used many compounds, for example, 7-(Diethylamino)-2-oxo-2H-chromene-3-carbonitrile (cas: 51473-74-6Quality Control of 7-(Diethylamino)-2-oxo-2H-chromene-3-carbonitrile).
7-(Diethylamino)-2-oxo-2H-chromene-3-carbonitrile (cas: 51473-74-6) belongs to nitriles. Trimerization of aromatic nitriles requires harsh reaction conditions, high temperatures, long reaction times, and pressure. In conventional organic reductions, nitrile is reduced by treatment with lithium aluminium hydride to the amine. Reduction to the imine followed by hydrolysis to the aldehyde takes place in the Stephen aldehyde synthesis, which uses stannous chloride in acid.Quality Control of 7-(Diethylamino)-2-oxo-2H-chromene-3-carbonitrile
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts