110452-10-3Relevant academic research and scientific papers
Synthesis and pharmacological screening of novel meso-substituted porphyrin analogs
Fadda, Ahmed A.,El-Mekawy, Rasha E.,El-Shafei, Ahmed I.,Freeman, Harold
, p. 53 - 61 (2013)
A novel series of mesotetrakis[aryl]-21H,23H-porphyrin derivatives 2a-j was synthesized from the condensation of aldehyde derivatives 1a-j with pyrrole in the presence of p-toluenesulfonic acid. The synthesized porphyrins were considered as a model to stu
Meso-tetracinnamylporphyrin: Synthesis, characterization and the catalytic activity of its Mn(III) complex in olefin epoxidation with tetra-n-butylammonium hydrogen monopersulfate
Zakavi, Saeed,Ashtiani, Amir Salami,Rayati, Saeed
experimental part, p. 1492 - 1496 (2010/05/01)
Meso-tetracinnamylporphyrin (H2tcp) has been synthesized and characterized by UV-Vis, 1H NMR and IR spectroscopies. Protonation of H2tcp with HCl is accompanied by a blue shift (77 cm-1) of the Q(0,0) band, probably indicating a decrease in the efficiency of the π-electron donation from the meso-substituents to the a2u orbital in comparison with the corresponding dication of meso-tetraphenylporphyrin (H2tpp). The unusual NH signal multiplicity observed in 1H NMR spectrum of H2tcp shows evidence of a long distance coupling between the vinyl protons and NH ones. This long range coupling can occur between the remote centers using the a2u orbital as a connector. Mntcp(OAc) shows higher catalytic activity (ca. 1.2-fold higher) than Mntpp(OAc) in olefin epoxidation with tetra-n-butylammonium hydrogen monopersulfate (TBAO). The low ratio (～1.5) of cis- to trans-stilbene oxide, in competitive oxidation of cis- and trans-stilbene with TBAO, strongly suggests the involvement a common high-valent manganese oxo complex as the reactive intermediate responsible for oxygen atom transfer.
