C([S:4][CH2:5][CH:6]([CH2:17][C:18]([O:20]C)=[O:19])[C:7]([N:9]1[CH2:16][CH2:15][CH2:14][C@H:10]1[C:11]([OH:13])=[O:12])=[O:8])(=O)C.[H][H].C(O)(=O)C>CO.[OH-].[Na+]>[C:18]([CH2:17][CH:6]([CH2:5][SH:4])[C:7]([N:9]1[CH2:16][CH2:15][CH2:14][C@H:10]1[C:11]([OH:13])=[O:12])=[O:8])([OH:20])=[O:19]To a solution of the product from Example 81 (3.0 g.) in methanol (60 ml.), 1N sodium hydroxide (60 ml.) is added. After 4 hours, the solution is applied to a column of Dowex 50 ion exchange resin in the hydrogen cycle, and the desired material is eluted with water to yield 2.3 g. of the named product Rf : 0.2 (silica gel-benzene:acetic acid, 75:25).
Wird geladen…