((S)-2-{(4S,5S)-5-[(R)-2-((R)-5-Isopropyl-3,3-dimethyl-2,4-dioxo-pyrrolidin-1-yl)-1-methyl-2-oxo-ethyl]-2,2,4-trimethyl-oxazolidin-3-yl}-1-methyl-2-oxo-ethyl)-methyl-carbamic acid tert-butyl ester 在
对甲苯磺酸 作用下,
以
甲醇 为溶剂,
生成 (S)-N-[(1S,2S,3R)-2-Hydroxy-4-((R)-5-isopropyl-3,3-dimethyl-2,4-dioxo-pyrrolidin-1-yl)-1,3-dimethyl-4-oxo-butyl]-2-methylamino-propionamide