## Abstract The reaction of 1‐acyl‐3,5‐dimethylpyrazoles 1 with CN compounds was kinetically controlled with __syn__ stereoselectivity through a lithium enolate intermediate using lithium diisopropylamide. In contrast, the __anti__ stereoselective reaction of 1 was caused by the action of diisopro
✦ LIBER ✦
Side reactions in synthesis of phenyl cyanate by acylation of phenol with cyanogen halides
✍ Scribed by V. A. Pankratov; Ts. M. Frenkel; S. V. Vinogradova; L. I. Komarova; V. B. Bondarev; V. V. Korshak
- Book ID
- 112438223
- Publisher
- Springer
- Year
- 1974
- Tongue
- English
- Weight
- 108 KB
- Volume
- 23
- Category
- Article
- ISSN
- 1573-9171
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## Abstract C‐acyl‐N‐(3‐phenyl‐5‐pyrazolyl)hydrazonoyl chlorides **1a,b** react with potassium thiocyanate and potassium selenocyanate to give 5‐acyl‐2,3‐dihydro‐2‐imino‐3‐(3′‐phenyl)pyrazol‐5′‐yl)‐1,3,4‐thiadiazoles **2a,b** and 5‐acetyl‐2,3‐dihydro;‐2‐imino‐3‐(3′‐phenyl)pyrazol‐5′‐yl)‐1,3,4‐selen