The first 4-alkenylquinazolinone synthesis was described by Brack 17 as an acidic rearrangement reaction starting from quinoline-1-carboxamides. This procedure was applied by Zolotykh. 18 Similarly, Molina et al. 19 described the 4-methylene derivatives formation when refluxing 2-[(aminocarbonyl)

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13) R. W. Alder,6 after reviewing a preprint of this manuscript, has asked that I "...put in the point that wall reactions for initiation may be important under some conditions".