3-NO<sub>2</sub>-5,10,15-triarylcorrolato-Cu as a versatile platform for synthesis of novel 3-functionalized corrole derivatives
作者:M. Stefanelli、M. Mancini、M. Raggio、S. Nardis、F. R. Fronczek、G. T. McCandless、K. M. Smith、R. Paolesse
DOI:10.1039/c4ob01247j
日期:——
β-Nitrocorroles are potentially valuable platforms for the preparation of a wide range of more elaborated corrole derivatives possessing unique chemical functionalities and electronic properties. Here we report our results on the chemical manipulation of a copper 3-NO2-triarylcorrolate using different organic reactions, all involving the reduction of –NO2 to –NH2 at an early stage, followed by further
Corrole and nucleophilic aromatic substitution are not incompatible: a novel route to 2,3-difunctionalized copper corrolates
作者:M. Stefanelli、F. Mandoj、S. Nardis、M. Raggio、F. R. Fronczek、G. T. McCandless、K. M. Smith、R. Paolesse
DOI:10.1039/c5ob00659g
日期:——
Although corrole is an electron rich macrocycle, nucleophilic aromatic substitution reactions can be used to peripherally elaborate this contracted porphyrinoid.
Functionalization of Corroles: The Nitration Reaction
作者:Manuela Stefanelli、Marco Mastroianni、Sara Nardis、Silvia Licoccia、Frank R. Fronczek、Kevin M. Smith、Weihua Zhu、Zhongping Ou、Karl M. Kadish、Roberto Paolesse
DOI:10.1021/ic7014572
日期:2007.12.1
The reaction of meso-triarylcorroles with AgNO2 proceeds with concomitant metalation and peripheral substitution to give the corresponding nitro-substituted silverIII corrole complex. The substitution is highly regioselective, giving only the corresponding 3-nitro derivative, among the different possible isomers. The results obtained indicate that the reaction intermediate is the pi-cation radical of the complex, which is then attacked by nitrite ion. This was proven by the reaction of the copper corrole complexes with NaNO2: in this case, the nitration reaction proceeded without the addition of an oxidant, because of the pi-cation radical character of the copper complex. The reaction is also successful in the case of 2,3,17,18-tetraethyl-8,12-diacetoxymethyl-7,13-dimethylcorrole (AMCorH3), with the formation of the meso-substituted silver corrole derivative (NO2)3AMCorAg (fully characterized by X-ray crystallography), the first of its kind to be reported. Two of the corroles are characterized by cyclic voltammetry and spectroelectrochemistry in dichloromethane, and the site of electron transfer is elucidated.