Solifenacin → Solifenacin Maleate
Reaction equation
[CH:1]1[CH:2]=[CH:3][C:4]([C@@H:7]2[N:16]([C:17]([O:19][C@@H:20]3[CH:25]4[CH2:26][CH2:27][N:22]([CH2:23][CH2:24]4)[CH2:21]3)=[O:18])[CH2:15][CH2:14][C:13]3[CH:12]=[CH:11][CH:10]=[CH:9][C:8]2=3)=[CH:5][CH:6]=1.[C:28]([OH:35])(=[O:34])/[CH:29]=[CH:30]\[C:31]([OH:33])=[O:32]>C(OC(C)C)(=O)C>[CH:1]1[CH:6]=[CH:5][C:4]([C@@H:7]2[N:16]([C:17]([O:19][C@@H:20]3[CH:25]4[CH2:24][CH2:23][N:22]([CH2:27][CH2:26]4)[CH2:21]3)=[O:18])[CH2:15][CH2:14][C:13]3[CH:12]=[CH:11][CH:10]=[CH:9][C:8]2=3)=[CH:3][CH:2]=1.[C:28]([O-:35])(=[O:34])/[CH:29]=[CH:30]\[C:31]([O-:33])=[O:32]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 45 °C
Procedure
6 g of solifenacin base from example 1 was dissolved in 60 ml of isopropyl acetate; 1.92 g of maleic acid was added and the mixture was heated to 45° C. for 15 minutes. The mixture is kept at room temperature overnight. In these conditions a colorless oil is obtained.