Darstellung und Struktur von Pyrazolyl-Kationen mit Polymethin- und Methan-Gerüst

Translated title of the contribution: Synthesis and structure of pyrazolyl cations with polymethine and methane framework

Eyup Akgün, Thomas Kämpchen, Ulf Pindur

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

The 4-pyrazoline-3-one 1 reacts with 4-dimethylaminobenzaldehyde to yield the stable asymmetric cyanine dye 2b which reacts with 1 to give the colorless (aryl) (dipyrazolyl) methane 3b. Using aldehydes with less cationstabilizing groups the polymethines 2 are not isolated but only the methanes 3. The structures of 2b and 3 are discussed by1H,13C and Hetero NMR spectra.

Translated title of the contributionSynthesis and structure of pyrazolyl cations with polymethine and methane framework
Original languageGerman
Pages (from-to)219-225
Number of pages7
JournalMonatshefte für Chemie Chemical Monthly
Volume114
Issue number2
DOIs
StatePublished - Feb 1 1983

Keywords

  • Cyanine dyes
  • Dipyrazolylmethanes
  • Heterocycles
  • N-15-NMR
  • O-17-NMR
  • Phenazon

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