2-pyrazolin-5-ones bearing a basic dialkylaminoalkyl substituent at the N1-position: Preparation and NMR spectroscopic investigations

2-Pyrazolin-5-ones (= tautomers to 5-hydroxypyrazols) bearing dialkylaminoyalkyl substituents at the ring nitrogen atom N-1 are prepared from the corresponding hydrazines and beta-ketoesters. Detailed NMR spectroscopic investigations ((1)H, (13)C, (15)N) with the obtained compounds are undertaken an...

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Bibliographic Details
Published inHeterocycles Vol. 75; no. 8; pp. 2035 - 2042
Main Authors Wolf, Barbara M. T., Eller, Gernot A., Holzer, Wolfgang
Format Journal Article
LanguageEnglish
Published OXFORD Elsevier 01.08.2008
Subjects
Chemistry
Chemistry, Organic
Physical Sciences
Science & Technology
tautomerism
AMINOALKYLHYDRAZINES
condensation
trialkylamino group
NMR spectroscopy
RING-SYSTEMS
SELECTION
pyrazolone
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Summary:2-Pyrazolin-5-ones (= tautomers to 5-hydroxypyrazols) bearing dialkylaminoyalkyl substituents at the ring nitrogen atom N-1 are prepared from the corresponding hydrazines and beta-ketoesters. Detailed NMR spectroscopic investigations ((1)H, (13)C, (15)N) with the obtained compounds are undertaken and the tautomerism of such pyrazolones in solution is discussed.
ISSN:0385-5414
DOI:10.3987/COM-08-11371