4-Hydroxycoumarin (1) reacted with Wittig reagents (2) to give 4-benzoylmethylcoumarin (5A) or [3-(4-hydroxycoumarinyl)]carbonylmethylenetriphenylphosphorane (6) depending upon the nature of the phosphorus ylide used. Dialkyl phosphonates (3a,b) and trialkyl phosphites (4a,b) converted 1 into the re
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ChemInform Abstract: Organophosphorus Chemistry. Part 30. The Behavior of 4-Hydroxycoumarin Toward Methylenetriphenylphosphoranes (Wittig Reagents) and Alkyl Phosphites.
โ Scribed by N. A. GANOUB; M. R. H. MAHRAN
- Publisher
- John Wiley and Sons
- Year
- 2010
- Weight
- 34 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0931-7597
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The Behavior of 2-Thioxo-4-thiazolidinones Toward Organophosphorus Reagents. -The reactions of the title heterocycles (I) with resonance stabilized phosphonium ylides, dialkyl phosphites, and trialkyl phosphites is studied. Whilst the reactions with ylides give rise to C-alkylated products [cf. (III