55525-94-5Relevant academic research and scientific papers
Novel [4 + 2] cycloaddition reaction of aryl-methylidenemalononitriles to unsaturated chalcogen amides. Synthesis, structure, and properties of triethylammonium 3,5,5-tricyano-1,4,5,6-tetrahydropyridine-2-selenolates and -thiolates
Frolov,Dotsenko,Krivokolysko,Kostyrko
, p. 1289 - 1300 (2013)
Reaction of arylmethylidenemalononitriles with 3-aryl-2-cyanoprop-2- eneselenoamides in the presence of Et3N gave triethylammonium 4,6-diaryl-3,5,5-tricyano-1,4,5,6-tetrahydropyridine-2-selenolates. A similar reaction with cyclohexylidenecyanothioacetamide yields triethylammonium 4-aryl-1,5,5-tri-cyano-3-azaspiro[5.5]undec-1-ene-2-thiolate. Alkylation of the obtained selenolates and thiolates gives 6-(alkylseleno)-2,4-diaryl-1,4- dihydropyridine-3,3,5(2H)-tricarbonitriles and 4-(alkylthio)-2-aryl-3-aza- spiro[5.5]undec-4-ene-1,1,5-tricarbonitriles, respectivelly. The structure of 2,4-di(2-furyl)-6-{[2-(4-methylphenyl)-2-oxoethyl]seleno}-1,4-dihydropyridine-3, 3,5(2H)-tricarbonitrile has been confirmed by the X-ray structural analysis.
A Novel Synthesis of Cyclopenta[c]pyridazines and 1,8-Ethanophthalazinones: A New Ring System
Elassar, Abdel-Zaher Abdel Aziz
, p. 580 - 595 (2007/10/03)
Cyclopentylidene derivatives 1a,b readily couple with aryl diazonium salts to give the cyclopenta[c]pyridazine derivatives 3a-d. Compounds 3a,b reacted with arylidenemalononitrile or active methylene nitrile derivatives to give 1,8-ethanophthalazinone 6a-f, 13 and 15. Cyclopenta[c]pyridazines 3a,b reacted with ethyl acetoacetate or acetylacetone to afford the ethyl butanoate or pentanone derivatives 16a,b, respectively.
Novel Synthesis of Indans, Tetralones, Condensed Benzocarbocyclic Nitriles and Condensed Pyridine-2(1H)-thiones from the Reactions of Cycloalkylidenemalononitriles with Arylmethylene(cyano)-acetamide and -thioacetamide
Elgemeie, Galal Eldin Hamza,Elzanate, Ali M.,Mansour, Abdel Kader
, p. 1073 - 1074 (2007/10/02)
A novel synthesis of indans, tetralons, condensed benzocarbocyclic nitriles and condensed pyridine-2(1H)-thiones from cycloalkylidenemalononitrile and arylmethylene(cyano)-acetamide and -thioacetamide is described.
Differences between the Reaction of 2-Benzylidenecyclopentanone with Malononitrile and the Reaction of Cyclopentylidenemalononitrile with Aromatic Aldehydes; Synthesis of Strong Fluorescent o-Aminonitriles
Mirek, Julian,Milart, Piotr
, p. 1471 - 1478 (2007/10/02)
It was found that instead of the Knoevenagel condensation of cyclopentylidenemalononitrile with aromatic aldehydes, a complex reaction takes place leading to 5,7-dicyano-1-arylidene-4-arylindanes.The same compounds were formed in the reaction of the cyclopentylidenemalononitrile dimer with aldehydes.It is suggested that the cyclopentylidenemalononitrile dimers undergo an electrocyclic ring opening leading to conjugated triene systems.These species are very reactive intermediates and may react with aldehydes in the next step.Bulky substituents in 2,5-dibenzylidenecyclopentanone hindered its Knoevenagel condensation with malononitrile but did not hinder its Michael addition leading to a 4H-pyrane derivative.Solutions of the obtained o-aminonitriles exhibit strong fluorescence in a variety of solvents. - Keywords: 2-Benzylidenecyclopentanone, Cyclopentylidenemalononitrile, o-Aminonitriles, Luminescent Spectra
Azo dyestuffs from benzene diazo component fused to an aliphatic ring and containing two cyano substituents ortho to the azo group
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, (2008/06/13)
Azo dyestuffs of the formula STR1 wherein X1 and X2 denote alkyl, cycloalkyl, aralkyl or aryl or conjointly form the remaining members of a fused non-aromatic carbocyclic ring system, X3 denotes hydrogen, alkyl, aralkyl or aryl and K represents the radical of a coupling component as well as their preparation and use for dyeing and printing synthetic fibre materials.
