Acetic acid 1-(4-acetoxy-6-methyl-2-oxo-1,2-dihydro-pyridin-3-yl)-2-oxo-2-phenyl-ethyl ester 在
叔丁基过氧化氢 、
potassium tert-butylate 作用下,
反应 0.08h,
生成 (2S,3S)-2-Benzoyl-6-methyl-1-oxa-5-aza-spiro[2.5]oct-6-ene-4,8-dione 、 (2R,3S)-2-Benzoyl-6-methyl-1-oxa-5-aza-spiro[2.5]oct-6-ene-4,8-dione