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US 2020/0087256 A1Published application
New method for preparing donepezil pamoate
AssigneesZhejiang Huahai Pharmaceutical Co., Ltd., Shanghai Aobo Pharmtech, Inc., Ltd.
InventorsWei XU, Xi CHEN, Hong GU
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Abstract
Disclosed is a new method for preparing a donepezil pamoate (1-benzyl-4-[(5,6-dimethoxyindan-2-one)methyl]piperidine pamoate). The donepezil pamoate prepared by using the method has a high purity and a good flowability.
Claims10
A method for preparing a crystal form A of a compound of formula I, comprising dissolving the compound of formula I in a reaction solvent and adding another solvent dropwise for precipitation to give the crystal form A of the compound of formula I.
Dependencies are inferred from the claim text.