ISSN:
1434-4475
Keywords:
Cyanine dyes
;
Dipyrazolylmethanes
;
Heterocycles
;
N-15-NMR
;
O-17-NMR
;
Phenazon
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The 4-pyrazoline-3-one1 reacts with 4-dimethylaminobenzaldehyde to yield the stable asymmetric cyanine dye2b which reacts with1 to give the colorless (aryl) (dipyrazolyl) methane3b. Using aldehydes with less cationstabilizing groups the polymethines2 are not isolated but only the methanes3. The structures of2b and3 are discussed by1 H,13C and Hetero NMR spectra.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00798325
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