Sodium Bicarbonate → HCID 69722150, compound

Reaction equation

C([O:4][C:5]1[CH:13]=[C:12]([C:14]([N:16]([CH2:27][C:28]2[CH:33]=[CH:32][CH:31]=[C:30]([O:34][C:35]3[CH:40]=[CH:39][C:38](Cl)=[CH:37][CH:36]=3)[CH:29]=2)[C@@H:17]2[C:26]3[C:21](=[CH:22][CH:23]=[CH:24][CH:25]=3)[CH2:20][CH2:19][CH2:18]2)=[O:15])[C:8]([C:9]([OH:11])=[O:10])=[CH:7][C:6]=1[C:42]([OH:44])=[O:43])(=O)C.C([O-])(O)=O.[Na+]>CO.O>[OH:4][C:5]1[CH:13]=[C:12]([C:14]([N:16]([CH2:27][C:28]2[CH:33]=[CH:32][CH:31]=[C:30]([O:34][C:35]3[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=3)[CH:29]=2)[C@@H:17]2[C:26]3[C:21](=[CH:22][CH:23]=[CH:24][CH:25]=3)[CH2:20][CH2:19][CH2:18]2)=[O:15])[C:8]([C:9]([OH:11])=[O:10])=[CH:7][C:6]=1[C:42]([OH:44])=[O:43]

Participants

Procedure

The products from Example 104B (0.97 g, 1.68 mmol) in methanol (60 mL) were treated with NaHCO3 (3.9 g, 46.4 mmol) in water (30 mL) and the mixture was stirred at room temperature for 24 hours. The methanol was removed under reduced pressure and the remaining aqueous solution was acidified to pH 1 with 1N HCl. The acidified solution was extracted with ethyl acetate (5×15 mL). The organic extracts were combined, washed with brine (10 mL), dried over Na2SO4, filtered and the filtrate concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 9:1 CH2Cl2:methanol to 8:2 CH2Cl2:methanol) to provide the title compounds as a foamy white solid (208 mg, 23%).