The non-aromatic cyclic products from base treatment of octa-1,7-diyne have been characterised as 1-, 2-, and 3-methylcyclohepta-1,3,5-trienes and cyclo-octa-1,3,5-triene. A logical scheme to encompass the formation of these compounds, ethylbenzene, and all the isomeric xylenes is suggested.
G. Eglinton, R. A. Raphael and J. A. Zabkiewicz, J. Chem. Soc. C, 1969, 469 DOI: 10.1039/J39690000469
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