An unexpected pentacarbonyl chromium complexation of a cyano group of the ABC core of cephalotaxine
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Add time:07/30/2019 Source:sciencedirect.com
A new penta-carbonyl chromium(0) complex of the type [Cr(CO)5(L)] (L = tetracyclic pyrrolobenzazepine unit 3) was surprisingly obtained by reacting [Cr(CO)3(naphthalene)] or [Cr(CO)3(tmtach)] with the tetracyclic pyrrolobenzazepine unit 3 in octane-ether/THF-solvent mixtures or acetone under ambient temperature or reflux. The new complex 13 has been characterized by spectral analysis including IR, 1H and 13C NMR data. For comparison purposes, the safrole-tricarbonyl chromium(0) complex 12 was prepared and characterized. X-ray diffraction analyses of both complexes were determined. Based on the above data, an octahedral structure has been assigned to the new complex 13.
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