tert-butyl N-[(4S)-6-(2,2-dimethylpropyl)-3'-oxospiro[3,4-dihydropyrano[2,3-b]pyridine-2,1'-cyclobutane]-4-yl]carbamate 在
吡啶 、
盐酸羟胺 作用下,
反应 2.0h,
生成
tert-butyl N-[(4S)-6-(2,2-dimethylpropyl)-3'-hydroxyiminospiro[3,4-dihydropyrano[2,3-b]pyridine-2,1'-cyclobutane]-4-yl]carbamate