## Abstract Several new 2,5‐disubstituted 1,3,4‐oxadiazoles have been synthesized in good yields by reaction of aromatic acids with hydrazine dihydrochloride in a mixture of orthophosphoric acid, phosphorus pentoxide and, in general, with addition of phosphorus oxychloride to the reaction mixture.
✦ LIBER ✦
Thermolysis of 1,3,4-Oxadiazole-5-ones, a New Precursor of Nitrilimines. A Novel Synthesis of Indazoles. Preliminary communication
✍ Scribed by Werner Reichen
- Publisher
- John Wiley and Sons
- Year
- 1976
- Tongue
- German
- Weight
- 161 KB
- Volume
- 59
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Thermolyses of the title compounds at various temperatures have been investigated. At the lower end of the temperature range studied indazoles 5a, b are formed in nearly quantitative yields, while at the upper end formal carbene‐type reaction‐products 6, 7, 8 have been isolated in just as high yields.
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