Abstract
The reaction of 2-benzylidene-1,3-diphenylpropanetrione (1a) with phosphorus ylides 2a–c afforded the new phosphonium ylides 4a–c. Trialkyl phosphites 3a–c react with 1a to give the respective dialkyl phosphonate products 5a–c. On the other hand, the olefinic compounds 6 and 7 were isolated from the reaction of 1b with Wittig reagents 2. Moreover, trialkyl phosphites reacted with 1b to give products 8a–c. Possible reaction mechanisms are considered, and the structural assignments are based on analytical and spectroscopic evidence. © 2000 John Wiley & Sons, Inc. Heteroatom Chem 11:57–64, 2000
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