Participants
| Role | Name | HCID | Charge |
|---|
| Reactant | Hydrochloric Acid | HCID 313 | — |
| Reactant | Donepezil | HCID 3152 | — |
| Solvent | Isopropanol | HCID 3776 | — |
| Product | Donepezil Hydrochloride | HCID 5741 | 79.4% |
Reaction Steps
1.0 g of Donepezil was dissolved in 9 ml of isopropyl alcohol (hereinafter, abbreviated as IPA) under heating at 40° C. The solution was cooled in an iced water bath. 0.31 g of Concentrated hydrochloric acid in 1 ml of IPA was added hereinto. It continued stirring for 30 minutes in an iced water bath. Filtration of the separated crystals followed by drying afforded 0.87 g of the title compound. (water content: 1.10%)
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|
| Patent number | US05985864 |
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| Source dataset | uspto-grants-1999_11 |
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| ORD ID | ord-22fbd5a3c8814aafbc5108f60d782b49 |
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| Source note | uspto-grants-1999_11 |
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