The reaction of active and stabilized ph
The reaction of active and stabilized phosphonium ylides with α,β-unsaturated carbonyl compounds [1]
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Fouad M. Soliman; Medhat M. Said; Soher S. Maigali
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Article
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1997
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John Wiley and Sons
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English
⚖ 232 KB
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