[O:1]=[C:2]1[N:6]2[C:7]3[CH:14]=[CH:13][C:12]([N:15]4[CH2:20][CH2:19][O:18][CH2:17][C:16]4=[O:21])=[CH:11][C:8]=3[O:9][CH2:10][C@H:5]2[C@H:4]([C:22]([OH:24])=O)[O:3]1.[Cl:25][C:26]1[CH:27]=[CH:28][C:29]([NH2:32])=[N:30][CH:31]=1.CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F>>[Cl:25][C:26]1[CH:27]=[CH:28][C:29]([NH:32][C:22]([C@H:4]2[C@H:5]3[N:6]([C:7]4[CH:14]=[CH:13][C:12]([N:15]5[CH2:20][CH2:19][O:18][CH2:17][C:16]5=[O:21])=[CH:11][C:8]=4[O:9][CH2:10]3)[C:2](=[O:1])[O:3]2)=[O:24])=[N:30][CH:31]=1Using compound (3R,3aS)-1-oxo-7-(3-oxomorpholin-4-yl)-1,3,3a,4-tetrahydrobenzo[b]oxazolo[3,4-d][1,4]oxazin-3-carboxylic acid (the product of step (b) in Example 36) (90 mg, 0.24 mmol), 5-chloropyridine-2-amine (37 mg, 0.287 mmol), HATU (137 mg, 0.36 mmol), and TEA (48.4 mg, 0.48 mmol) as starting materials, preparation following the method as described in Example 11 (g) afforded white solid 56 mg, yield: 52.65%.
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