M. Hirano et al., SYNTHESIS OF LACTONES VIA THE OXIDATION OF ALPHA,OMEGA-DIOLS WITH SODIUM BROMITE AND ALUMINA UNDER WATER FREE CONDITIONS, Synthetic communications, 28(1), 1998, pp. 123-130
Oxidation of alpha,omega-diols with sodium bromite can be readily perf
ormed in dichloromethane to afford lactones in fair good yield under m
ild and neutral conditions with the aid of chromatographic acidic alum
ina.