Condensation of ethyl diazoacetate with cobalt porphyrins.

摘要: Condensation of ethyl diazoacetate with various cobalt complexes octaethylporphyrin causes insertion ethoxycarbonylcarbene into a cobalt–nitrogen bond to give salt (VI) the cobalt(III) adduct. Reduction chromium(II) salts formation neutral halogenocobalt(II) N-ethoxy-carbonylmethyloctaethylporphyrin, e.g.(XIII). The action acid under oxidative conditions on yields first halogenocobalt(II)N-ethoxycarbonylhalogenomethyloctaethylporphyrin (XI), and then, after removal metal, 21,22-ethoxycarbonylmethyleneoctaethylporphyrin, example cis-21,22-bridged porphyrin. parent 21,22-methyleneoctaethylporphyrin is obtained by condensation di-iodomethane octaethylporphyrin.