(S)-5-[2-(4-cyanophenyl)-1-oxo-2,8-diazaspiro[4.5]dec-8-yl]-2-(3,5-dimethylisoxazole-4-sulfonylamino)-5-oxopentanoic acid tert-butyl ester 在
吡啶 、
硫化氢 、
三乙胺 作用下,
生成 (S)-2-(3,5-Dimethyl-isoxazole-4-sulfonylamino)-5-[2-(4-mercaptocarbonimidoyl-phenyl)-1-oxo-2,8-diaza-spiro[4.5]dec-8-yl]-5-oxo-pentanoic acid tert-butyl ester