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Quinolinetriones, Phosphonium Ylides, Wittig Reaction Quinolinetrione (1a) reacts with phosphonium ylides (2a-c) to yield the corresponding ethylenes (3a-c) together with triphenylphosphine oxide. Treatment of trione (lb) with ylides (2a-b) affords, on the other hand, the cyclobuta (c) quinoline derivatives (4a) and (4b), respectively. Structural assignments are based on analytical and spectroscopic evidence.

Phosphonium Ylides, V.Wittig Reaction with 2,3,4(1H̲ )-QuinoIinetriones