Diporphyrinylamines: Synthesis and Electrochemistry
摘要:
The synthesis of three possible diporphyrinylamines is described. All compounds were obtained by using the Buchwald-Hartwig aromatic amination reaction. The electronic spectra of the three porphyrin dimers showed characteristic features found In highly delocalized systems. The first oxidation of these compounds took place on the connecting amine function.
Efficient oxidation of cumene to cumene hydroperoxide with ambient O<sub>2</sub> catalyzed by metalloporphyrins
作者:Hai M. Shen、Hong L. Ye、Qin Wang、Meng Y. Hu、Lei Liu、Yuan B. She
DOI:10.1142/s1088424621500310
日期:2021.4
protocol for oxidation of cumene to cumenehydroperoxide was presented using ambient O2 catalyzed by very simple metalloporphyrins. The selectivity toward cumenehydroperoxide reached 98.3% in the cumene conversion of 28.1% with T(4-COOH)PPCu as a catalyst at 80∘C. The origin of the higher performance of T(4-COOH)PPCu was mainly ascribed to the low catalytic performance of copper(II) in the cumene hydroperoxide
A new catalytic method for the denitrogenative transannulation/cyclopropanation of in‐situ‐generated 2‐(diazomethyl)pyridines is described using a cobalt‐catalyzed radical‐activation mechanism. The method takes advantage of the inherent properties of a CoIII‐carbene radical intermediate and is the first report of denitrogenative transannulation/cyclopropanation by a radical‐activation mechanism, which
A new general one-pot method for the synthesis of various metalloporphyrins has been developed from pyrrole and substituted aldehydes using transition metal salts. This method allows higher working concentrations than those previously reported. Along with the reported metalloporphyrins, some new metalloporphyrins were synthesized in good yield.
Cobalt, nickel, copper, and oxidovanadium(2+) could be incorporated into nonpolar tetraphenyl porphyrin by using feed materials as metal sulfate, nitrate, and chloride salts and reaction in high-te...
Poly(3-hexylthiophene)s end-functionalized with π-extended porphyrins show a broad absorption profile up to 700 nm and a fibrillar microstructure tuned by the porphyrin molar ratio.