Pub No:
302
Title:
Characterization of Decamethyl Pentaphyrin and Related Pentaphyrin Derivatives
Authors:
Danso-Danquah, R.E., Xie, L. and David Dolphin
Journal:
Heterocycles
Year:
1995
Pages:
41(11), 2553-2564
Abstract:
The syntheses of decamethyl- and ethoxycarbonylpentaphyrins are described. Their spectroscopic characterizations are presented in comparison with the permethyl derivatives of porphyrin, sapphyrin and hexaphyrin. The ethoxycarbonyl-containing pentaphyrins are the only examples, amongst the expanded polypyrrolic macrocycles, that have an electron-withdrawing group directly attached to the macrocyclic ring system. Elimination of a pyrrole and methine carbon unit in the mass spectrometer has been observed as a common feature for the pentaphyrin free bases as well as their metal derivatives.

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