A novel use of electron spin resonance spectroscopy in the detection of a sigmatropic rearrangement
Abstract
The triethyl phosphite-induced conversion of [4-2H1]phenyl 2-nitrophenyl sulphide via a sigmatropic rearrangement into [3-2H1]phenothiazine has been demonstrated by e.s.r. spectroscopic examination of the cation radical of the latter.