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

Eyup Akgün; Thomas Kämpchen; Ulf Pindur

doi:10.1007/BF00798325

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

Medicinal Chemistry

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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 contribution	Synthesis and structure of pyrazolyl cations with polymethine and methane framework
Original language	German
Pages (from-to)	219-225
Number of pages	7
Journal	Monatshefte für Chemie Chemical Monthly
Volume	114
Issue number	2
DOIs	https://doi.org/10.1007/BF00798325
State	Published - Feb 1 1983

Keywords

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

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title = "Darstellung und Struktur von Pyrazolyl-Kationen mit Polymethin- und Methan-Ger{\"u}st",

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.",

keywords = "Cyanine dyes, Dipyrazolylmethanes, Heterocycles, N-15-NMR, O-17-NMR, Phenazon",

author = "Eyup Akg{\"u}n and Thomas K{\"a}mpchen and Ulf Pindur",

year = "1983",

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doi = "10.1007/BF00798325",

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AU - Akgün, Eyup

AU - Kämpchen, Thomas

AU - Pindur, Ulf

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Y1 - 1983/2/1

N2 - 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.

AB - 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.

KW - Cyanine dyes

KW - Dipyrazolylmethanes

KW - Heterocycles

KW - N-15-NMR

KW - O-17-NMR

KW - Phenazon

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

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