Donepezil Oxalate → Donepezil

HRID 456984

Reaction equation

HRID 456984 reaction equation
[CH3:1][O:2][C:3]1[CH:8]=[C:7]2[CH2:9][CH:10]([CH2:13][CH:14]3[CH2:19][CH2:18][N:17]([CH2:20][C:21]4[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=4)[CH2:16][CH2:15]3)[C:11](=[O:12])[C:6]2=[CH:5][C:4]=1[O:27][CH3:28].C(O)(C(O)=O)=O>O>[CH3:1][O:2][C:3]1[CH:8]=[C:7]2[CH2:9][CH:10]([CH2:13][CH:14]3[CH2:15][CH2:16][N:17]([CH2:20][C:21]4[CH:22]=[CH:23][CH:24]=[CH:25][CH:26]=4)[CH2:18][CH2:19]3)[C:11](=[O:12])[C:6]2=[CH:5][C:4]=1[O:27][CH3:28]

Participants

3

Reactant 1

HCID 11397232Donepezil Oxalate

Product 1

HCID 3152Donepezil

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

Donepezil oxalate is dissolved in water and basified. Donepezil base thus obtained, is extracted in a suitable solvent and acidified with aqueous hydrochloric acid. The solvent is evaporated and aqueous acidic solution of Donepezil hydrochloride is lyophilized to obtain Donepezil hydrochloride amorphous form.

Sources & evidence

ORD record
ord-89100b8d2c32439cb682a641e143944c
Source dataset
uspto-grants-2007_03
Patent number
US07186842B2

Linked notes

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