<i>meso</i>-Tetraphenylbenzoporphyrin-2<sup>2</sup>,2<sup>3</sup>-dicarboxylic Anhydride: A Platform to Benzoporphyrin Derivatives
作者:Carla M. B. Carvalho、Sérgio M. Santos、Maria G. P. M. S. Neves、Augusto C. Tomé、Artur M. S. Silva、João Rocha、José A. S. Cavaleiro
DOI:10.1021/jo400948s
日期:2013.7.5
A method to synthesize meso-tetraphenylbenzoporphyrin-2(2),2(3)-dicarboxylic anhydride is reported. This compound reacts with alkylamines and arylamines to afford the corresponding "phthalimides" in moderate to excellent yields. The reaction of the title compound with benzene-1,4-diamine or with benzene-1,3-diamine yields the corresponding N,N'-(phenylene)bisphthalimides, whereas with benzene-1,2-diamine or naphthalene-1,8-diamine it affords heterocyclic-fused porphyrins. Molecular mechanics simulations elucidates the multiplicity of signals observed in the NMR spectra of the N,N'-(1,4-phenylene)bisphthalimide 11. This molecule exhibits two preferential conformations corresponding to a coplanar and an almost perpendicular arrangement of the benzoporphyrin units relative to the central benzenic ring.