Oxidation of α-Oxo-Oximes to Nitrile Oxides with Hypervalent Iodine Reagents
摘要:
Upon reaction with PhI(OAc)(2), alpha-oxo-aldoximes are oxidized to alpha-oxo-nitrile oxides, while alpha-oxo-ketoximes are converted into nitrile oxides via the oxidative cleavage of the carbonyl-imino sigma bond. The nitrile oxides thus formed were trapped with norbornene or styrene in good yield. alpha,alpha'-Dioxo-ketoximes react less efficiently.