Vergleichende Reaktivitätsuntersuchungen am neuen Codimeren aus Malonitril und Cyanessigester an Carbonylverbindungen |
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Authors: | Hans Junek Burkhard Thierrichter Peter Wibmer |
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Institution: | (1) Institut für Organische Chemie, Abteilung für Organische Chemie I, Universität Graz, A-8010 Graz, Österreich |
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Abstract: | The reactivity of 3-amino-2,4-dicyano-methyl-(1d) and-ethyl-crotonate (1e), resp., a new type of codimer from malononitrile and cyanoacetate, was investigated. Condensation reactions with aromatic aldehydes (2a-g), with heterocyclic aldehydes (2j-l), nitrosobenzenes (3a-c) ando-hydroxybenz-and-naphtaldehydes (4a-f), resp., are described, the differences in reactivity, compared with dimer malononitrile and dimeric forms of cyanoacetate (1a-c) are negligible. Condensation compounds of1a with cycloalkanones (5a-c) are able to cyclise with sulfur to cycloalkanonothieno-pyridines (6a-b), while the cycloalkano-derivatives of1d gave no ring closure.Herrn Prof. Dr.O. E. Polansky zum 60. Geburtstag in Erinnerung an gemeinsame Tätigkeiten auf dem Gebiet der Nitrilchemie gewidmet. |
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Keywords: | Carbonyl compounds Condensation Malononitrile-cyanoacetate codimer |
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