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Simi K Pushpan
Articles written in Journal of Chemical Sciences
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Volume 112 Issue 3 June 2000 pp 384-384
Characterization of normal and inverted sapphyrins and rubyrins
A Srinivasan Simi K Pushpan V G Anand T K Chandrashekar
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Volume 115 Issue 5-6 October 2003 pp 711-720
Heptaphyrins: Expanded porphyrins with seven heterocyclic rings
Venkataramanarao G Anand Simi K Pushpan Sundararaman Venkatraman Tavarekere K Chandrashekar
Expanded porphyrins containing seven pyrrole/heterocyclic rings linked in a cyclic fashion are termed heptaphyrins. The number of
π -electrons in heptaphyrins depends on the number ofmeso carbon bridges used to link the heterocyclic rings, accordingly heptaphyrins with 28π -electrons and 30π -electrons are reported to date. Both condensation reactions of the appropriate precursors and acid-catalysed oxidative coupling reactions have been utilized to synthesise the heptaphyrins. The 30π heptaphyrins exhibit rich structural diversity where some of the heterocyclic rings in the macrocycle undergo a 180° ring flipping. An overview of the synthetic methods employed for the synthesis of heptaphyrins, their spectroscopic properties, structural behaviour and aromatic properties are highlighted in this paper.
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Journal of Chemical Sciences
Volume 135, 2023
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Posted on July 25, 2019Click here for Editorial Note on CAP Mode
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