Dimroth-rearranged products in the reactions of 1-aryl-2-methylthiopyrimidinium salts with hydrazines
✍ Scribed by Jürgen Liebscher; Ahmed Hassoun; Henk van der Plas; C. Stam
- Book ID
- 112129721
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 1990
- Tongue
- English
- Weight
- 280 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0022-152X
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📜 SIMILAR VOLUMES
## Dedicated to Professor Dr. Fritz Sauter on the occasion of his 75 th birthday 1-Acetyl-and 1-propionyl-2-pyrazolines 11-27 have been synthesized by the reaction of (3coumarinyl)chalcones 1-10 with hydrazine in hot acetic acid or propionic acid. While 5-aryl-3-(3coumarinyl)-1-phenyl-2-pyrazoline
Reaction of the readily available (5-ethoxy-l,5-diaryl-2,4-pentadienylidene)ethyloxonium perchlorate 1 with hydrazines, R2NNH 2 or RNHNH2,provides a simple and efficient synthesis of previously unknown (5-ethoxy-1,5-diaryl-2,4-pentadienylidene)hydrazinium salts 2a-d. Application of this method to th