Reaction of ethyl diazoacetate with cobalt(II) octaethylporphin yields a cobalt(III) salt (III) as the primary adduct; reactions of (III) include rearrangement with chromous chloride to the chlorocobalt(II) complex of N-ethoxycarbonylmethyloctaethylporphin (IV) and with ethanolic hydrogen chloride to the metalfree, NN-bridged compound (V; R3= CO2Et).
P. Batten, A. Hamilton, A. W. Johnson, G. Shelton and D. Ward, J. Chem. Soc., Chem. Commun., 1974, 550 DOI: 10.1039/C39740000550
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