## Abstract Simple and convenient synthesis of hitherto unknown 3,5‐diaminopyrazole‐4‐carbothioamides 3 as well as new ethyl 3,5‐diaminopyrazole‐4‐carboxylates 7 is reported. The key intermediates were 2‐cyano‐propenethioamides 2 and 2‐(ethoxycarbonyl)propenethioamides 5 which were readily obtained
Reactions of 4,5-diaminopyrazoles with chalcones and acetylarenes
✍ Scribed by V. D. Orlov; N. N. Kolos; Kh. Kiroga; Z. Kaluski; É. Figas; K. A. Potekhin
- Book ID
- 104932596
- Publisher
- Springer US
- Year
- 1992
- Tongue
- English
- Weight
- 291 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0009-3122
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📜 SIMILAR VOLUMES
## Abstract The reaction of the tetraaminopyrimidine 1 with the chalcones **2a‐f** yields, in the presence of catalytic amounts of acetic acid, the 1__H__‐pyrimido[4,5‐__b__][1,4]diazepine derivatives **3a‐f.** The cyclization process consists of a condensation reaction and a Michael type addition.
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