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書き出し
Palladium‐Catalyzed [3+2] and [2+2+2] Annulations of 4‐Iodo‐2‐quinolones with Activated Alkynes through Selective C−H Activation
概要
The palladium‐catalyzed reaction of 4‐iodo‐2‐quinolones with activated alkynes was investigated. Cyclopenta[de ]quinoline‐2(1 H )‐ones and/or phenanthridine‐6(5 H )‐ones were obtained through [3+2] annulation involving aromatic C−H activation or [2+2+2] annulation involving vinylic C−H activation, respectively. Reasonable mechanisms for the formation of these annulation products have been proposed based on density functional theory calculations.
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