On November 30, 1986, Mirek, Julian; Milart, Piotr published an article.SDS of cas: 2510-01-2 The title of the article was Differences between the reaction of 2-benzylidenecyclopentanone with malononitrile and the reaction of cyclopentylidenemalononitrile with aromatic aldehydes. Synthesis of strong fluorescent o-aminonitriles. And the article contained the following:
Knoevenagel condensation of CH2(CN)2 with benzylidinecyclopentanone (I, X = O) gave adduct I [X = C(CN)2] in 23% yield. In contrast, condensation of cyclopentylidenemalononitrile (II) or its dimer (III) with RCHO (IV, R = Ph, 4-MeC6H4, 4-ClC6H4) gave indene derivatives V in 58-70% yields. III is suggested to undergo an electrocyclic ring opening to a reactive trienic intermediate which condenses with IV and then cyclizes and aromatizes to V. Solutions of the aminonitriles exhibited strong fluorescence in a variety of solvents. The experimental process involved the reaction of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile(cas: 2510-01-2).SDS of cas: 2510-01-2
The Article related to cyclopentylidenemalononitrile aryl aldehyde condensation, knoevenagel condensation malononitrile benzylidenecyclopentanone, indan cyano arylidene aryl, aminonitrile fluorescence and other aspects.SDS of cas: 2510-01-2
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts