890402-81-0Relevant articles and documents
Impurities of heterocyclic boronic acid compound and control method thereof
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, (2020/08/25)
The invention provides impurities (I) and (II) of duogliptin L-tartrate and a preparation method thereof. The impurities (I) and (II) are oxidation impurities of the duogliptin L-tartrate, and are generated in the preparation and placement processes of the duogliptin L-tartrate. The invention also provides a method for controlling the contents of the impurities (I) and (II) while reducing the total impurities during industrial production of the duogliptin L-tartrate, so that the quality standard of the duogliptin L-tartrate is improved, and the medication safety of the duogliptin L-tartrate isguaranteed. In addition, the impurities (I) and (II) are used as reference standards or reference substances and can be used for quality control and research of duogliptin or L-tartrate crude drugs and/or preparations thereof.
METHODS OF PREPARING HETERCYCLIC BORONIC ACIDS AND DERIVATIVES THEREOF
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Page/Page column 35, (2008/06/13)
In the context of synthesizing heterocyclic boronic acid compounds, a convergent synthetic methodology is particularly efficient for preparing boropyrrolidines and derivatives of boropyrrolidines.