Alkyl radicals from t-butyl esters through photoinduced electron transfer
作者:Elisa Fasani、Diego Peverali、Angelo Albini
DOI:10.1016/0040-4039(94)88486-2
日期:1994.12
Alkylradicals are obtained under mild conditions from 1,2,4,5-benzenetetracarbonitrile SET photosensitized fragmentation of t-butyl esters. The same process occurs with undissociated carboxylic acids.
Electron-donating behaviour of aliphatic carboxylic acids in the photoreaction with 1,2,4,5-tetracyanobenzene
作者:Kazuo Tsujimoto、Nobuhisa Nakao、Mamoru Ohashi
DOI:10.1039/c39920000366
日期:——
Irradiation of an acetonitrile solution of 1,2,4,5-tetracyanobenzene with aliphatic carboxylic acids gives 2,4,5-tricyanoalkylbenzenes efficiently; electron transfer from the carboxylic acids to the excited tetracyanobenzene is essential.
Photo-inducedelectrontransfer reactions of hexamethyldisilane and aromaticnitriles have been examined; hexamethyldisilane acts as an effective σ-donor, and undergoes novel photochemical silylation of aromaticnitriles.
Photoinduced reactions of polycyanoaromatic compounds with aliphatic nitriles
作者:Kazuo Tsujimoto、Keiichi Abe、Mamoru Ohashi
DOI:10.1039/c39830000984
日期:——
Upon irradiation of 1,3,5-tricyanobenzene in isobutyronitrile one or two ring hydrogens were replaced with isopropyl groups, while in the case of 1,2,4,5-tetracyanobenzene one of the cyano groups was replaced.
Limits to oxidation of organic substrates. SET oxidative processes of commonly used solvents as revealed through the photochemical reaction with 1,2,4,5- benzenetetracarbonitrile
chemical reactivity upon single electron transfer of some common solvents has been explored. This has been obtained by using photo excited benzene-1,2,4,5-tetracarbonitrile (TCB) as the oxidant. Under this condition acetonitrile, isobutyronitrile, methanol and trifluoroethanol all undergo α-deprotonation from their radical cations giving alkyl radicals which are trapped by TCB−. and yield aikylbenzenetricarbonitriles