Granted Patent
B2
US 8,334,385 · App. 12/740,693 · Granted Dec 18, 2012
Process for the preparation of R-sitagliptin and its pharmaceutically acceptable salts thereof
Assignee:
Glenmark Generics Limited
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Abstract
The present invention provides processes for the preparation of R-sitagliptin (as shown) and its pharmaceutically acceptable salts thereof.
Claims (2)
1. Crystalline (R)-sitagliptin having an x-ray powder diffraction pattern comprising reflections at 7.3°, 17.6°, 18.8°, 21.2°, 21.5°, 22.4°, 24.1°, 24.4°, 24.7°, 27.0° and 28.7° ±0.2° 2θ.
2. The crystalline (R)-sitagliptin of claim 1 , having a differential scanning calorimetry thermogram with an endotherm at 117.66° C. with an onset at 116.37° C. and an endset at 119.58° C.
Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Aug 27, 2019
From: GLENMARK PHARMACEUTICALS LIMITED
To: GLENMARK LIFE SCIENCES LIMITED
Reel/Frame 050179/0351 →
MERGER
Recorded Aug 22, 2019
From: GLENMARK GENERICS LIMITED
To: GLENMARK PHARMACEUTICALS LIMITED
Reel/Frame 050156/0723 →
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Aug 24, 2012
From: ARJUNAN, SANKAR; PATIL, MAHENDRA RAGHUNATH; KHAN, MUBEEN AHMED
To: GLENMARK GENERICS LIMITED
Reel/Frame 028843/0101 →
Priority Claims (1)
IN 2190/MUM/2007
· Nov 2, 2007
· national
Continuity (1)