[CH2:1]([O:8][C:9]([NH:11][C@H:12]([CH:16]1[CH2:21][CH2:20][CH2:19][CH2:18][CH2:17]1)[C:13]([OH:15])=O)=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.CN([C:25]([O:29][N:30]1N=NC2C=CC=N[C:31]1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.Cl.CNOC.CN1CCOCC1>CN(C=O)C.CCOC(C)=O>[CH2:1]([O:8][C:9](=[O:10])[NH:11][C@H:12]([CH:16]1[CH2:21][CH2:20][CH2:19][CH2:18][CH2:17]1)[C:13](=[O:15])[N:30]([O:29][CH3:25])[CH3:31])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1To a solution of (R)-benzyloxycarbonylamino-cyclohexyl-acetic acid (25 g, 88 mmol) in DMF (100 mL) at −10° C. was added HATU (36.7 g, 96 mmol, 1.0 equiv) followed by N,O-dimethyl hydroxyamine HCl salt (10.3 g, 105 mmol, 1.2 equiv). To this solution was then slowly added N-methyl morpholine (28.9 mL, 263 mmol, 3.0 equiv). The internal temperature was carefully monitored. During the addition, the internal temperature rose to 0° C. The solution was stirred at 0° C. for 2 hours after which the solution was diluted with EtOAc (500 mL) and washed with sat. aq. NaHCO3 solution, water, 1.0 N aq. HCl solution and brine. The organic layer was dried over Na2SO4 and the solvent including DMF was removed under vacuum. The residue was diluted with EtOAc and the solution was washed with water, brine, dried (MgSO4) and concentrated to give product [(R)-Cyclohexyl-(methoxy-methyl-carbamoyl)-methyl]-carbamic acid benzyl ester 26 g (yield 90%).
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