Addition of diazomethane to a toluene solution of C70 affords a mixture of isomeric pyrazolines, which, upon photolysis, furnish two isomeric C71H2 cyclopropanes; thermolysis of the mixture produces two isomeric annulenes.
A. B. Smith, R. M. Strongin, L. Brard, G. T. Furst, W. J. Romanow, K. G. Owens and R. J. Goldschmidt, J. Chem. Soc., Chem. Commun., 1994, 2187 DOI: 10.1039/C39940002187
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