138964-39-3Relevant academic research and scientific papers
Synthesis of 2,7,12,17-tetraaryl-3,8,13,18-tetranitroporphyrins; electronic effects on aggregation properties of porphyrins
Ono, Noboru,Muratani, Emiko,Fumoto, Yumiko,Ogawa, Takuji,Tazima, Kunihiko
, p. 3819 - 3824 (2007/10/03)
Novel porphyrins substituted with aryl and nitro substituents at the β-position were prepared by the tetramerization of 2-hydroxymethyl-3-aryl-4-nitropyrroles. Aggregation properties of these porphyrins are investigated by means of UV-VIS, 1H-NMR and EPR spectroscopy. Porphyrin 4a substituted with 4-methoxyphenyl and nitro groups was found to form a strong cofacial aggregate in solution (K = 900-1300 dm3 mol-1). The extent of aggregation decreases in the following order: porphyrin 4a (nitro and 4-methoxyphenyl substituents) > 4b (nitro and phenyl substituents) > TMTP (methyl and phenyl substituents) > OEP (ethyl substituents). EPR spectra of Cu-4a support the dimer structure of 4a, and the distance between two porphyrins is estimated to be about 4 A.
Preparation of 2-Formyl-4-nitropyrroles
Ono, Noboru,Muratani, Emiko,Ogawa, Takuji
, p. 2053 - 2055 (2007/10/02)
The Vilsmeier reaction of 3-nitropyrroles which are prepared by the reaction of nitroalkenes with the sodium salt of tosylmethylisocyanide gives 2-formyl-4-nitropyrroles in good yields
