OXIDATION OF 3,4-DISUBSTITUTED ISOXAZOLIN-5-ONES. A NEW SYNTHESIS OF α-KETO ACIDS
m-Chloroperoxybenzoic or peroxyformic acid oxidation of 3,4-disubstituted isoxazolin-5-ones affords the corresponding 4-hydroxy derivatives from which, by ring opening, nitriles and α-keto acids are obtained.