Synthesis of 2-nitro-3-(pyrrol-1-yl)-5,10,15,20-tetraarylporphyrins via a Clauson-Kaas reaction and the study of their electronic properties
作者:Raju Tiwari、Mahendra Nath
DOI:10.1039/c5nj00014a
日期:——
Versatile synthesis of new porphyrin building blocks, 2-nitro-3-(pyrrol-1-yl)-5,10,15,20-tetraarylporphyrins is described. These porphyrins demonstrate red shifted absorption bands and S2 emission.
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.
β-Pyrazino-fused tetrarylporphyrins
作者:Federica Mandoj、Sara Nardis、Rajesh Pudi、Larisa Lvova、Frank R. Fronczek、Kevin M. Smith、Luca Prodi、Damiano Genovese、Roberto Paolesse
DOI:10.1016/j.dyepig.2013.04.024
日期:2013.10
A novel method for the preparation of beta-fused porphyrin dyads was developed that exploits a one-pot reaction of 2,3-diaminoporphyrins with diethyl oxalate. This approach provides good yields of the zinc beta-fused dyad and the corresponding free-base, opening the way for preparation of several metal derivatives to permit modulation of optoelectronic characteristics for commercial applications. (C) 2013 Elsevier Ltd. All rights reserved.