Reactions of cyclic 1,3-dicarbonyl compounds with 1,2(1,4)-dihydro-1-methyl-2(4)-methylene-N-heterocycles. A new access to 6,12-methano-dibenz[d,g]-[1,3]oxazocinones View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1994-01

AUTHORS

Hans-Georg Henning, Le Hoang Thanh, Jörg Laue, Barbara Urban, Günter Reck

ABSTRACT

The enamine-type methylene-N-heterocycles1–5 react with cyclic 2-ethoxymethylene-1,3-dicarbonyl compounds6 to give 2-[2-(hetarylidene)ethylidene]-1,3-dicarbonyl compounds7–14. The result of the reactions between 1,2-dihydro-1-methyl-2-methylene-quinoline (1a) and cyclic 1,3-dicarbonyl compounds depends on the nature of the dihydro intermediatesA/B. Dehydrogenation of keton intermediatesA results in 2-(1,2-dimethyl-4(1H)-quinolylidene)-1,3-dicarbonyl compounds17–21. Enol intermediatesB with 6-membered dicarbonyl ring form 6,12-methano-dibenz-[d,g][1,3]oxazocinones22–25.1H NMR spectra and X-ray structure analysis prove the structure of23. More... »

PAGES

95-105

References to SciGraph publications

  • 1967-05. Oxy- und Aminomethylenmeldrumsäuren in MONATSHEFTE FÜR CHEMIE - CHEMICAL MONTHLY
  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1007/bf00811679

    DOI

    http://dx.doi.org/10.1007/bf00811679

    DIMENSIONS

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