The active ketenylidene-(2a) or thioketenylidenetriphenylphosphoranes (2b) react with 2-benzylidene-1,3-indandione (1), 5-benzylidenebarbituric acid (11), and 4-benzylidene-1,2-diphenyl-3,5-pyrazolidinedione (16) to give the corresponding pyranones and thioxopyranones (3a,b, 12a,b) and (17a,b), resp
ChemInform Abstract: Chemistry of Phosphorus Ylides. Part 15. Reaction with Phosphacumulenes. Part 9. Reaction of Active and Stabilized Phosphonium Ylides with α,β-Unsaturated Carbonyl Compounds.
✍ Scribed by F. M. SOLIMAN; M. M. SAID; S. S. MAIGALI
- Publisher
- John Wiley and Sons
- Year
- 2010
- Weight
- 35 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0931-7597
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Part 3. Photoreactions of α,β-Unsaturated γ,δ-Epoxy Dinitrile, α-Cyano Ester, and Diester with Various Dipolarophiles. -Photolysis of the dinitrile (I) generates a carbonyl ylide which undergoes 1,3-dipolar cycloaddition with enol ethers [cf. (II)] to give cycloadducts (III) and (IV) in low yields.