Reaction of carbonyl-stabilized allyl sulfoxonium ylides with michael acceptors
β Scribed by J.P. Marino; Takushi Kaneko
- Publisher
- Elsevier Science
- Year
- 1973
- Tongue
- French
- Weight
- 178 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0040-4039
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π SIMILAR VOLUMES
Recent publications concerned with resonance-stabilized sulfonlum ylldes have covered their preparation, but relatively few of their chemical reactions have been described. l,'j-Dipoles are useful starting materials for the synthesis of heterocycles. In a recent note'), the result of the reaction b
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