- A sand geleg sandbank salt and its preparation method
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The invention relates to a saxagliptin salt and a preparation method thereof. The saxagliptin salt has a structure represented by the formula II. Saxagliptin p-toluene sulfonate with a stable crystal form can be obtained through the salt-forming reactions between saxagliptin free alkali and p-toluene sulfonic acid under different solution systems. Stability researches show that saxagliptin p-toluene sulfonate has a better thermal stability than that of saxagliptin monohydrate and saxagliptin hydrochloride. Moreover, the preparation method of the saxagliptin salt is simple and is suitable for industrial production.
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Paragraph 0034; 0035
(2018/11/03)
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- CRYSTAL FORMS OF SAXAGLIPTIN AND PROCESSES FOR PREPARING SAME
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Physical crystal structures of a compound of the formula (I): are provided including the free base monohydrate thereof (form H-1) and the hydrochloric acid salt thereof, including hydrochloric acid salt containing 0.75 equivalent of H2O (form H0.75-3) and hydrochloric acid salt containing 2 equivalents of H2O (form H2-1), and hydrochloric acid salt Pattern P-5, preferably in substantially pure form, and other forms as described herein, pharmaceutical compositions containing structures of compound I or IA, processes for preparing same, intermediates used in preparing same, and methods of treating diseases such as diabetes using such structures.
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Page/Page column 27-28
(2008/12/08)
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