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Communication | Special issue | Vol 37, No. 1, 1994, pp.207-212
Published online, 1st January, 1970
DOI: 10.3987/COM-93-S29
Kinetic vs Thermodynamic Product Distributions of Macrocyclic Tetrapyrrole Cyclization Products from 1,19-Disubstituted A,C-Biladiene Salts

Kevin R. Gerzevske, Jack J. Lin, and Kevin M. Smith*

*Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, CA 95616-5295, U.S.A.


Chromium(III) promoted oxidative cyclization reactions of a,c-biladiene hydrobromides bearing bulky 1- and 19-substituents to give macrocyclic products are partially reversible; depending upon the reaction temperature, kinetic or thermodynamic products are formed and identified.