copper(II) 5,10,15,20-tetrakis(m-methoxyphenyl)porphyrin 在
二氧化氮 作用下,
以
not given 为溶剂,
以91%的产率得到[2-nitro-5,10,15,20-tetrakis(3-methoxyphenyl)porphyrinato]copper(II)
products 5 and 25 and provide additional mechanistic evidence for the intermediacy of the cyclopropylchlorin. Use of porphyrins with modified meso-phenyl positions illustrates the generality of this methodology and allows a novel method for the preparation of a wide range of reduced porphyrins, which may find application in fields such as the photodynamic therapy (PDT) of cancer.
Direct β-amination reaction in porphyrin systems—a simple route to compounds containing two nitrogen substituents at both β-positions of the same pyrrole unit
作者:Stanisław Ostrowski、Sebastian Grzyb
DOI:10.1016/j.tetlet.2012.09.024
日期:2012.11
The direct beta-amination of porphyrin derivatives is described. 2-Nitro-meso-tetraarylporphyrins (zinc and copper complexes) react with N,N,N-trimethylhydrazinium iodide (TMHI) in the presence of a base (KOH/DMSO system, ca 70-80 degrees C) to give products of nucleophilic aromatic substitution of hydrogen. In this process, the nucleophilic replacement of a H-atom by an NH2 group takes place. The products obtained, bearing two neighbouring nitrogen substituents on the same pyrrole ring, are valuable intermediates for various synthetic uses. (C) 2012 Elsevier Ltd. All rights reserved.
Synthesis of β-functionalized Temoporfin derivatives for an application in photodynamic therapy
The synthesis of novel beta-functionalized derivatives of the clinically used photosensitizer Temoporfin has been achieved by nucleophilic addition reactions to a corresponding diketo chlorin. The beta-substituted dihydroxychlorin products exhibit a strong absorption in the red spectral region, a high singlet oxygen quantum yield, and were found to be highly effective in in vitro assays against HT-29 tumor cells. (C) 2011 Elsevier Ltd. All rights reserved.
[EN] APPLICATION OF ß-FUNCTIONALIZED DIHYDROXY-CHLORINS FOR PDT<br/>[FR] APPLICATION DE CHLORES-DIHYDROXY ?-FONCTIONNALISÉS POUR TPD