Issue 32, 2017, Issue in Progress

One pot synthesis of unusual meso-dipyrrinyl corrole

Abstract

We have synthesized an unusual meso-dipyrrinyl corrole 1 in one pot reaction using 2 + 1 approach, by condensing pentafluorobenzaldehyde with meso-free dipyrromethane under TFA catalyzed reaction conditions followed by oxidation with a mild oxidant such as p-chloranil. The product was not obtained when we used other aldehydes such as p-nitrobenzaldehyde and p-cyanobenzaldehyde as well as when we changed the oxidant from p-chloranil to DDQ. We elucidated the molecular structure of 1 using detailed 1D and 2D NMR spectroscopy. The absorption spectrum showed typical Soret band and three Q-bands with slight shifts in the peak maxima compared to meso-free corrole. The meso-dipyrrinyl corrole was decently fluorescent and showed emission band at 678 nm. The preliminary study showed that the meso-free carbon of meso-dipyrrinyl corrole was sufficiently reactive for functionalization but the resulted functionalized meso-dipyrrinyl corroles were not stable to isolate. Our attempts to prepare metal complexes of meso-dipyrrinyl corroles remained unsuccessful because of the unstable nature of the resulted coordination complexes.

Graphical abstract: One pot synthesis of unusual meso-dipyrrinyl corrole

Supplementary files

Article information

Article type
Paper
Submitted
04 Mar 2017
Accepted
29 Mar 2017
First published
04 Apr 2017
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2017,7, 19878-19884

One pot synthesis of unusual meso-dipyrrinyl corrole

L. V. Krishna Kandala, T. Kaur and M. Ravikanth, RSC Adv., 2017, 7, 19878 DOI: 10.1039/C7RA02664A

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