β-Functionalized zinc(II)aminoporphyrins by direct catalytic hydrogenation
摘要:
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.
A new general method for selective β-polynitration of porphyrins; preparation and redox properties of Zn-porphyrins bearing one through to eight β-nitro substituents and X-ray structure of the first Zn β-pernitro porphyrin
作者:Magali Palacio、Virginie Mansuy-Mouries、Guillaume Loire、Karine Le Barch-Ozette、Philippe Leduc、Pierrette Battioni、Daniel Mansuy、Kathleen M. Barkigia、Jack Fajer
DOI:10.1039/b004160m
日期:——
20-tetrakis(2,6-dichlorophenyl)porphyrin, Zn(TDCPP), is achieved by controlled titration with the HNO3–CF3SO3H–(CF3S O2)2O system, and affords a full series of Zn porphyrins bearing one through to eight β-nitro groups in high yield and exhibiting a wide range of reduction potentials (from −920 to +155 mV vs. SCE); an X-ray structure of the first reported β-pernitrated Zn porphyrin Zn(TDCPN8P)(EtOH)2·2EtOH