## Abstract Using methylglyoxal as the α‐dicarbonyl component in the new pyridazine synthesis described in an earlier publication, two isomeric methyl‐5‐cyano‐pyridazones‐(6) are obtained with cyanoacetic acid hydrazide. The position of the methyl groups has been proved.
Heilmittelchemische Studien in der heterocyclischen Reihe. 19. Mitteilung. Pyridazine X. Cyan-pyridazin-Derivate mit analgetischer Wirkung
✍ Scribed by P. Schmidt; J. Druey
- Publisher
- John Wiley and Sons
- Year
- 1957
- Tongue
- German
- Weight
- 426 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Abstract
The analgetic activity of 1,3,4‐trimethyl‐5‐cyano‐pyridazone‐(6) (I), a compound chemically similar to the pyridine‐alkaloid ricinine is discussed. Many similar derivatives have been prepared, but only pyridazones having in position 5 a cyano, in 3 and 4 alkyl, and in 1 a methyl group have shown a high analgetic activity in animals. The 6‐methoxypyridazine XX, isomeric with the first named compound, is the only pyridazine derivative which has shown similar analgetic activity.
📜 SIMILAR VOLUMES
## Abstract A new synthesis of 6‐pyridazones starting from three single components is described. The starting materials are (1) and α‐diketone, α‐ketoaldehyde or glyoxal, (2) a carbonic acid having an active methylene group in α‐position, and (3) hydrazine or a monosubstituted hydrazine.
## Abstract The amebicidal activity of the phenanthroline quinones published earlier^2^) and of their derivates described in this paper is discussed. The highest activity was found with 4,7‐phenanthrolino‐5, 6‐ quinone **1** and its monosemicarbazone **3**, which are also active in man. Further der
## Abstract It has been shown that the reaction between kojic acid and hydrazine hydrate gives rise to two main products: 3,6‐dihydroxymethyl‐4‐oxo‐1,4‐dihydro‐pyridazine, and the hydrazone of 3‐hydroxymethyl‐pyrazol‐5‐yl‐hydroxyacetaldehyde, the structures of which were proved unambiguously.
## Abstract The synthesis of 4‐hydrazino‐benzo‐1,2,3‐thiadiazine 1,1‐dioxides is described. Chemical reactions and properties of these compounds are discussed. Some of the derivatives show hypotensive as well as diuretic activity.
## Abstract 1‐Methyl‐3‐cyano‐l, 6‐dihydro‐pyridine (III) was allowed to react under mild conditions with maleic anhydride. After acid hydrolysis of the resulting adduct IV, followed by esterification of the dicarboxylic acid V, 2‐methyl‐5,6‐dicarbomethoxy‐7‐cyano‐2‐aza‐bicyclo[2.2.2]octene‐(7) (VI)