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The reaction of stabilized ylides and related onium salts with tropylium ion

โœ Scribed by G. Cavicchio; M. D'Antonio; G. Gaudiano; V. Marchetti; P.P. Ponti


Book ID
104235572
Publisher
Elsevier Science
Year
1977
Tongue
French
Weight
247 KB
Volume
18
Category
Article
ISSN
0040-4039

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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