C(OC(=O)[NH:7][C@H:8]1[CH2:13][CH2:12][C@H:11]([CH2:14][CH2:15][N:16]2[C:21]3[CH:22]=[C:23]([O:26][CH3:27])[CH:24]=[CH:25][C:20]=3[O:19][CH2:18][C:17]2=[O:28])[CH2:10][CH2:9]1)(C)(C)C.NC1CCN(CCN2C3C(=CC=C(C#N)C=3)C=CC2=O)CC1>>[NH2:7][C@H:8]1[CH2:13][CH2:12][C@H:11]([CH2:14][CH2:15][N:16]2[C:21]3[CH:22]=[C:23]([O:26][CH3:27])[CH:24]=[CH:25][C:20]=3[O:19][CH2:18][C:17]2=[O:28])[CH2:10][CH2:9]1tert-Butyl{trans-4-[2-(6-methoxy-3-oxo-2,3-dihydro-4H-1,4-benzoxazin-4-yl)ethyl]cyclohexyl}carbamate (Intermediate 75) was reacted as described for Intermediate 14. The crude trifluoro acetate of the title compound was used without further purification for the next step (quantitative yield).
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