New synthesis of 3-aryl-5-amino-1H-pyrazoles
✍ Scribed by V. G. Nenaidenko; I. V. Golubinskii; O. N. Lenkova; A. V. Shastin; E. S. Balenkova
- Publisher
- SP MAIK Nauka/Interperiodica
- Year
- 2004
- Tongue
- English
- Weight
- 65 KB
- Volume
- 40
- Category
- Article
- ISSN
- 1070-4280
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
A new efficient procedure has been proposed for the synthesis of 3-aryl-5-amino-1H-pyrazoles by reaction of α-chloro-β-arylacrylonitriles with hydrazine hydrate.
## Abstract magnified image A series of 3‐acyl‐4‐amino‐1‐aryl‐1__H__‐pyrazoles has been prepared by reaction of β‐enaminones with benzenediazonium tetrafluoroborates substituted especially by fluorine‐containing groups (F, CF~3~, and OCF~3~). The compounds prepared have been characterized by means
## Abstract magnified image A regiospecific cyclization‐dehydration reaction of a 1‐[(4‐(__N__‐alkyl‐__N__‐(__tert__‐butyloxycarbony)amino)‐phenyl]‐4,4,4‐trifluorobutane‐1,3‐done with a 4‐aminosulfonyl‐, or 4‐methylsulfonyl‐, phenylhydrazine hydrochloride in refluxing ethanol proceeded with simult