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Ar Reaction Toward the Synthesis of Fluorinated Quinolino[2,3,4‐at]porphyrins
作者:Damaris Thuita、Matthew J. Guberman‐Pfeffer、Christian Brückner
DOI:10.1002/ejoc.202001347
日期:2021.1.15
An intramolecular SNAr displacementreaction of an o‐fluorine atom on a meso‐pentafluorophenyl group by the β‐amino‐group in meso‐tetrakis(pentafluorophenyl)‐2‐amino‐metalloporphyrin (M=Cu(II), Ni(II), Zn(II)) provides a novel pathway toward quinoline‐annulated metalloporphyrins. The corresponding free base chromophore is available by demetallation.
We report on a novel synthetic procedure to obtain B-aminoporphyrins with zinc(II) as the metal center by using the catalytic reduction of the parent Zn(II)beta-nitroporphyrins with hydrogen in the presence of Pd/C using dimethylformamide as the solvent. This simple method allows the preparation of beta-aminoporphyrins with substituents with diverse electronic properties: meso-tetraphenylporphyrin (TPP), meso-tetrakis(2,6-dichlorophenyl)porphyrin (TDCPP), and meso-tetrakis(2,3,4,5,6-pentafluorophenyl)porphyrin (TPFPP). (C) 2012 Elsevier Ltd. All rights reserved.