[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]([N:15]2[C:23]3[C:18](=[C:19]([NH:24][S:25]([CH2:28][CH3:29])(=[O:27])=[O:26])[CH:20]=[CH:21][CH:22]=3)[CH:17]=[CH:16]2)([CH2:13][CH3:14])[C:9]([O:11]C)=O)=[CH:4][CH:3]=1.[NH3:30]>CO>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]([N:15]2[C:23]3[C:18](=[C:19]([NH:24][S:25]([CH2:28][CH3:29])(=[O:26])=[O:27])[CH:20]=[CH:21][CH:22]=3)[CH:17]=[CH:16]2)([CH2:13][CH3:14])[C:9]([NH2:30])=[O:11])=[CH:6][CH:7]=1The product from Step A above (0.43 g, 1.0 mmol) was dissolved in a 7 N solution of ammonia in methanol (25 mL). After stirring at RT for 10 h, the resulting mixture was concentrated under reduced pressure. The residue was dissolved in dioxane/water, acidified with TFA, and purified directly on RP-HPLC to give the title compound. LC/MS m/z=420.1 [M+H]+. The two enantiomers were separated by SFC chiral separation.
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