Photoalkylation of 10-Alkylacridinium Ion via a Charge-Shift Type of Photoinduced Electron Transfer Controlled by Solvent Polarity
作者:Shunichi Fukuzumi、Kei Ohkubo、Tomoyoshi Suenobu、Kouta Kato、Mamoru Fujitsuka、Osamu Ito
DOI:10.1021/ja004311l
日期:2001.9.1
(DeAcrH+) in a nonpolar solvent (benzene) is found to be as efficient as those of 10-methylacridinium cation (MeAcrH+) and DeAcrH+ in a polar solvent (acetonitrile). Irradiation of the absorption bands of MeAcrH+ in acetonitrile solution containing tetraalkyltin compounds (R(4)Sn) results in the efficient and selective reduction of MeAcrH+ to yield the 10-methyl-9-alkyl-9,10-dihydroacridine (AcrHR)
Dehydrogenation vs Oxygenation in Photosensitized Oxidation of 9-Substituted 10-Methyl-9,10-dihydroacridine in the Presence of Scandium Ion
作者:Shunichi Fukuzumi、Shunsuke Fujita、Tomoyoshi Suenobu、Hiroshi Imahori、Yasuyuki Araki、Osamu Ito
DOI:10.1021/jp0128729
日期:2002.2.1
with oxygen occurs efficiently in the presence of 9,10-dicyanoanthracene (DCA) and scandium triflate [Sc(OTf)3] under visible light irradiation in oxygen-saturated acetonitrile (MeCN) to yield the 9-substituted 10-methylacridiniumion (AcrR+) and H2O2 or the 10-methylacridiniumion (AcrH+) and the oxygenated products of R such as ROOH, depending on the type of substitutent R. No DCA-photosensitized
Thermodynamic Control in Ion Radical Cleavages through Out-of-Cage Diffusion of Products. Dynamics of C−C Fragmentation in Cation Radicals of <i>tert</i>-Butylated NADH Analogues and Other Ion Radicals
alkyl group, cationradicals of NADHanalogues alkylated para to the nitrogen atom (AHR), generated by direct or indirect electrochemical means, may undergo C−C fragmentation or deprotonation. The former reaction is dominant with the tert-butyl substituent and the latter with methyl and phenyl substituents. It is shown that the cleavage reaction produces AH+ and the tert-butyl radical which is then