Donepezil → Donepezil Maleate

HRID 1888066Notes

Reaction equation

HRID 1888066 reaction equation
[CH3:1][O:2][C:3]1[CH:4]=[C:5]2[CH2:14][CH:13]([CH2:15][CH:16]3[CH2:21][CH2:20][N:19]([CH2:22][C:23]4[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=4)[CH2:18][CH2:17]3)[C:11](=[O:12])[C:6]2=[CH:7][C:8]=1[O:9][CH3:10].[C:29]([OH:36])(=[O:35])/[CH:30]=[CH:31]\[C:32]([OH:34])=[O:33]>CC(C)=O>[CH3:1][O:2][C:3]1[CH:4]=[C:5]2[CH2:14][CH:13]([CH2:15][CH:16]3[CH2:17][CH2:18][N:19]([CH2:22][C:23]4[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=4)[CH2:20][CH2:21]3)[C:11](=[O:12])[C:6]2=[CH:7][C:8]=1[O:9][CH3:10].[C:29]([O-:36])(=[O:35])/[CH:30]=[CH:31]\[C:32]([O-:34])=[O:33]

Participants

4

Reactant 2

HCID 3152DonepezilHCID 444266Maleic Acid

Product 1

HCID 24801486Donepezil Maleate

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent

Procedure

Donepezil (3.79 g, dissolved in 20 ml of ethyl acetate) is slowly added to a solution of maleic acid (0.58 g) in acetone (5 ml) with stirring at room temperature. The solid precipitated is filtered and dried at 55° C. under vacuum to give the title compound. Melting point: 130.3° C.

Workup

  1. customThe solid precipitated
  2. filtrationis filtered
  3. customdried at 55° C. under vacuum

Sources & evidence

ORD record
ord-44e779ef293c4416a0bccc677d30c76e
Source dataset
uspto-grants-2013_08
Patent number
US08501779B2

Reaction notes

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