Exclusive Formation of 1-Aryl-3-(5-nitro-2-furyl)-4-aroylpyrazoles via Regiospecific 1,3-Dipolar Cycloaddition of 3-Arylsydnones with α,β-Acetylenic Ketones.
✍ Scribed by Jyoti C. Hegde; Ganesha Rai; Vedavati G. Puranik; Balakrishna Kalluraya
- Publisher
- John Wiley and Sons
- Year
- 2006
- Weight
- 16 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0931-7597
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Symmetrical and unsymmetrical ␣-diazo-b-diketones undergo thermal Wolff rearrangements to generate ␣-carbonylketenes to participate as dienes in Diels-Alder reactions with 4-aryl-2-methyl-2,3-dihydro-1,5-benzothia/diazepines to give, where applicable, regiospecific cycloadducts, 4a,5,6,12tetrahydro