Regioselective pyridination of m-benziporphyrin |
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| Authors: | Stepień Marcin Latos-Grazyński Lechosław |
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| Institution: | Department of Chemistry, University of Wroc?aw, 14 F. Joliot-Curie St., Wroc?aw 50 383, Poland. |
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| Abstract: | reaction: see text] Reaction of tetraaryl-m-benziporphyrin with pyridine and silver tetrafluoroborate yields 22-pyridiniumyl-m-benziporphyrin as the only substitution product. This compound is further rearranged to a fused m-benziphlorin containing a 4a-azafluorene fragment. A mechanism involving a high-valent silver complex is proposed for the pyridination reaction. |
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