La(OTf)3-catalyzed one-pot synthesis of meso-substituted porphyrinic thiazolidinones
摘要:
An improved synthetic procedure is developed for the regioselective nitration of a phenyl group of meso-tetraphenylporphyrin by using NaNO2 in a mixture of trichloroacetic acid and AcOH. The meso-(4-nitrophenyl)porphyrins are successfully reduced to corresponding meso-(4-aminophenyl)porphyrins by SnCl2 under acidic conditions. In addition, an efficient one-pot methodology for synthesizing a series of novel meso-substituted porphyrinic thiazolidinone conjugates is developed by reacting meso-(4-aminophenyl)porphyrins with various aromatic aldehydes and mercaptoacetic acid in refluxing toluene using La(OTf)(3) as a catalyst. The products obtained are characterized on the basis of their spectral data. Preliminary photophysical properties of the newly synthesized compounds are reported.
Monofunctional electrophilic and nucleophilic derivatives of meso-tetraphenylporphyrin for attachment to peptides
作者:Susan E. Matthews、Colin W. Pouton、Michael D. Threadgill
DOI:10.1039/c39950001809
日期:——
4-Nitrophenyl N-[4-(10,15,20-triphenylporphyrin-5-yl)phenyl]carbamate and 5-[4-(N-glycylamino)phenyl]-10,15,20-triphenylporphyrin have been synthesised from a readily prepared monofunctionalised porphyrin; they couple efficiently with the side-chains of extended lysyl and glutamyl peptide derivatives, respectively.
A convenient protocol for the preparation of 5-phenyl-10,15,20-tris(4-sulfonatophenyl)porphyrin, a water-soluble porphyrin with unique aggregation properties, is described. The procedure relies on the one-pot reductive deamination of 5-(4-aminophenyl)-10,15,20-tris(4-sulfonatophenyl)porphyrin, that can be in turn easily obtained from 5,10,15,20-tetraphenylporphyrin by a known three-step sequence involving
Microtubular Self‐Assembly of Covalent Organic Frameworks
作者:Bappaditya Gole、Vladimir Stepanenko、Sabrina Rager、Matthias Grüne、Dana D. Medina、Thomas Bein、Frank Würthner、Florian Beuerle
DOI:10.1002/anie.201708526
日期:2018.1.15
Despite significant progress in the synthesis of covalentorganicframeworks (COFs), reports on the precise construction of template‐free nano‐ and microstructures of such materials have been rare. In the quest for dye‐containing porous materials, a novel conjugated framework DPP‐TAPP‐COF with an enhanced absorption capability up to λ=800 nm has been synthesized by utilizing reversible imine condensations
(Aminophenyl)porphyrins as precursors for the synthesis of porphyrin-modified siloxanes
作者:José Almeida、Maria E. Fortună、Lucia Pricop、Andrei Lobiuc、Andreia Leite、André M. N. Silva、Rodrigo P. Monteiro、Maria Rangel、Valeria Harabagiu、Ana M. G. Silva
DOI:10.1142/s1088424619500573
日期:2019.9
research reports the efficient synthesis of mono- and di-(aminophenyl)porphyrins and their metalation with Zn(II) using microwave irradiation. The subsequent reaction of amino-functionalized porphyrins with siloxane moieties bearing epoxy or carboxyl functional groups provided four new porphyrin-modified siloxanes. The structure of the resulting derivatives was established by 1H-NMR and MALDI-TOF-MS
With the objective of developing an antitumor agent, the synthesis of a chromenopyrazoledione conjugated to a tetraphenylporphyrin is described. A complete conformational analysis of the novel porphyrin conjugate was performed using ab initio Hartree–Fock calculations at the 6-31G* level. The novel conjugate (14) shows stronger absorption intensity for both Soret and Q-bands than the free meso-tetraphenylporphyrin