[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([N:8]([C@H:12]2[C:21]3[C:16](=[CH:17][CH:18]=[CH:19][CH:20]=3)[N:15]([C:22](=[O:30])[C:23]3[CH:28]=[CH:27][C:26]([OH:29])=[CH:25][CH:24]=3)[C@@H:14]([CH3:31])[CH2:13]2)[C:9](=[O:11])[CH3:10])=[CH:4][CH:3]=1.[H-].[Na+].Cl[CH2:35][CH2:36][CH2:37][S:38]([OH:41])(=[O:40])=[O:39]>CN(C=O)C>[C:9]([N:8]([C:5]1[CH:4]=[CH:3][C:2]([Cl:1])=[CH:7][CH:6]=1)[C@H:12]1[C:21]2[C:16](=[CH:17][CH:18]=[CH:19][CH:20]=2)[N:15]([C:22]([C:23]2[CH:24]=[CH:25][C:26]([O:29][CH2:35][CH2:36][CH2:37][S:38]([OH:41])(=[O:40])=[O:39])=[CH:27][CH:28]=2)=[O:30])[C@@H:14]([CH3:31])[CH2:13]1)(=[O:11])[CH3:10](2S,4R)-N-(4-Chloro-phenyl)-N-[1-(4-hydroxy-benzoyl)-2-methyl-1,2,3,4-tetrahydro-quinolin-4-yl]-acetamide (207 mg, 0.481 mmol) was dissolved in DMF (5 mL) at room temperature. NaH (58 mg, 2.40 mmol) was added followed by 3-chloro-propane-1-sulfonic acid (sodium salt, 135 mg, 0.60 mmol) and the reaction was allowed to stir over night. The mixture was partitioned between methylene chloride and HCl (1.0N/water), then extracted three times with methylene chloride, dried over MgSO4, filtered and concentrated. The crude residue was purified by preparatory HPLC to afford the product.
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