## Abstract Pyrazolo‐[3,4‐__d__]pyrimidine‐4,6‐diones **5** and pyrazolo[4,3‐__d__]pyrimidine‐5,7‐diones **7** were synthesized by Curtius rearrangement of pyrazolic mono‐esters **2** and **3** followed by hetero‐cyclization __via__ the ureas derivatives **4** and **6** under alkaline conditions.
✦ LIBER ✦
Pyrimidine derivatives XII. A convenient preparation of 6-formylpyrimidinedione and 2- and 3-formylpyridine derivatives from corresponding nitrooxymethyl derivatives
✍ Scribed by Toshio Kinoshita; Hiroshi Ohishi
- Book ID
- 112131088
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 1994
- Tongue
- English
- Weight
- 318 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0022-152X
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