A compound formerly believed to be a monomeric dibenzazatropone is shown to be a dimer and to yield a bisazatropone on oxidation. The monomeric dibenzazatropone, 6-ethoxy-7-oxodibenz[b,d]azepine, has been prepared. Syntheses and reactions of further N-toluene-p-sulphonyl 6-substituted dibenz[b,d]azepinones with bases have been studied.
W. C. Peaston and G. R. Proctor, J. Chem. Soc. C, 1968, 2481 DOI: 10.1039/J39680002481
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