Synthesis of 1,3,4-triphenyl-1,3,4-azadiphosphacyclopentane
✍ Scribed by N. A. Kardanov; S. A. Trifonova; R. I. Zhdanov; N. N. Godovikov; M. I. Kabachnik
- Book ID
- 112446173
- Publisher
- Springer
- Year
- 1982
- Tongue
- English
- Weight
- 49 KB
- Volume
- 31
- Category
- Article
- ISSN
- 1573-9171
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## Abstract The acid catalyzed condensation of 4,5‐diaminopyrazoles and chalcones gave the hitherto unknown 1‐benzyl‐2,4,6‐triphenyl‐2,3‐dihydropyrazolo[3,4‐__b__][1,4]diazepines derivatives. The structure of all products was supported by ir, ^1^H and ^13^C‐nmr and mass spectra.
In contrast to previously reported reactivity of the tungsten pentacarbonyl complex of a 2-substituted 1,2-dihydrophosphete, which apparently undergoes electrocyclic ring opening to the corresponding 1-phospha-1,3-butadiene and subsequent ]2ם4[ cycloaddition reactions with dienophiles, the reactio