(S)-2-(2-Oxo-propionylamino)-propionic acid (S)-1-[(S)-1-carbamoyl-2-(4-hydroxy-phenyl)-ethylcarbamoyl]-2-methyl-propyl ester 在
氢氟酸 作用下,
反应 1.0h,
以77%的产率得到(3S,9S,12S)-6-Hydroxy-9-(4-hydroxy-benzyl)-12-isopropyl-3,6-dimethyl-1-oxa-4,7,10-triaza-cyclododecane-2,5,8,11-tetraone