Abstract
Nitrosation of α, α'-dianions produced from ketones using a couple of bases was carried out with tert-butyl nitrite(tert-BuONO) in ether, and then two regioisomers of oximes(but not acetone)were obtained simultaneously. The ratio of these regioisomers was remarkably reversed by the addition of hexamethylphosphoric triamide(HMPA).
