Novel radical chain substitution reaction involving single electron transfer SET processes
摘要:
Beta-Substituted alpha[(phenylsulfonyl)methyl]- and alpha-z[(phenylthio)methyl]cyclohexenones 1-4 underwent regioselective replacement of the sulfonyl and sulfenyl groups by stabilized carbanions such as LiCMe2NO2 mainly by a radical chain mechanism, which was confirmed by investigating the effects of photoirradiation, radical scavengers, and reaction solvents and by the ESR and spectroscopic studies.