Azapolymethinfarbstoffe durch nucleophile Substitution am Stickstoff

Authors

  • B. Hirsch Institut für Farbenchemie der Technischen Universität Dresden (DDR)
  • E.-A. Jauer Institut für Farbenchemie der Technischen Universität Dresden (DDR)
  • B.N. Baijal Institut für Farbenchemie der Technischen Universität Dresden (DDR)

DOI:

https://doi.org/10.2533/chimia.1966.147

Abstract

Various esters and ethers of oximino derivatives of non-ionic active methylene compounds condense readily with cycloimmonium quaternary salts in presence of a base to give azamero-carbocyanine dyes containing the group =CH–N=, with the nitrogen atom attached to the active methylene component.
The dyes prepared are deeper in colour compared to the corresponding dimethinmerocyanines but do not show the expected bathochromic shift of 100 nm.
Efforts to condense the oximes themselves have shown that the oximes often fail to react. An explanation for this behaviour is offered.

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Published

1966-05-31

Issue

Vol. 20 No. 5 (1966): Forschung/Research

Section

Kurze Mitteilungen

License

Copyright (c) 1966 B. Hirsch

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

[1]
B. Hirsch, E.-A. Jauer, B. Baijal, Chimia 1966, 20, 147, DOI: 10.2533/chimia.1966.147.