Synthesis of 1,2,3-triphenyl-4-azaazulene
β Scribed by Mary K. Conner; E. LeGoff
- Book ID
- 108385001
- Publisher
- Elsevier Science
- Year
- 1970
- Tongue
- French
- Weight
- 136 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
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## Abstract The acid catalyzed condensation of 4,5βdiaminopyrazoles and chalcones gave the hitherto unknown 1βbenzylβ2,4,6βtriphenylβ2,3βdihydropyrazolo[3,4β__b__][1,4]diazepines derivatives. The structure of all products was supported by ir, ^1^H and ^13^Cβnmr 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 β«]2Χ4[β¬ cycloaddition reactions with dienophiles, the reactio