Reactions with Carbo(heterylhydrazonoyl) Halides. I. Chemistry of Carbo(3-phenylpyrazol-5-yl-hydrazonoyl) Chlorides
✍ Scribed by Mohamed Rifaat Hamza Elmoghayar; Mohamed Hilmy Elnagdi; Mohamed Kamal Ahmed Ibrahim; Mohamed Mohamed Mohamed Sallam
- Book ID
- 102252646
- Publisher
- John Wiley and Sons
- Year
- 1977
- Tongue
- German
- Weight
- 272 KB
- Volume
- 60
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
The Carbo(3‐phenylpyrazol‐5‐yl‐hydrazonoyl) halides 1a,b react with active methylene compounds to yield the 1‐(3‐phenylpyrazol‐5‐yl)‐pyrazole derivatives 2a–k (Scheme 1). The acyclic intermediates 3a,b could be isolated from reaction of 1a,b with acetylacetone, thus establishing the substitution mechanism for these reactions.
Compounds 1a, b reacted with carbon disulfide, phenyl isothiocyanate, methyl cyanide, and with p‐chlorobenzaldehyde to yield the corresponding heterocyclic derivatives 5–8, respectively (Scheme 2).
The behaviour of compounds 2 with hydrazine hydrate is reported.