S. Ooba, M. Ohta, H. Kato
Jun 1, 1970
Citations
0
Influential Citations
2
Citations
Journal
Bulletin of the Chemical Society of Japan
Abstract
1-Acetyl- and 1-isopropenyl-3-methylenecyclobutane (I and II) were prepared and then subjected to pyrolysis. The pyrolysis of I at 304–340°C gave 2-methyl-5-methylene-Δ2-dihydropyrane, which was then converted to 4-methylenecyclohexanone at this temperature. The pyrolysis of II at 255–340°C gave 1-methyl-4-methylenecyclohexene, which was disproportionated at this temperature to p-xylene and 1,4-dimethylcyclohexene. In neither case was fragmentation to olefins observed. These results were interpreted by a two-step biradical mechanism.