[F:1][C:2]([F:14])([F:13])[S:3]([C:6]1[CH:11]=[CH:10][C:9]([OH:12])=[CH:8][CH:7]=1)(=[O:5])=[O:4].[OH-].[Li+:16]>CO>[F:13][C:2]([F:1])([F:14])[S:3]([C:6]1[CH:7]=[CH:8][C:9]([O-:12])=[CH:10][CH:11]=1)(=[O:4])=[O:5].[Li+:16]Compound (2) from Example 2, in anhydrous methanol, was neutralized with equivalent amount of lithium hydroxide: The solvent was then removed, and the residue dissolved in a small amount of anhydrous THF. Ether was subsequently added and the solution stored in a refrigerator. The precipitated crystals were filtered and washed with ether.
Wird geladen…