| Identification | Back Directory | [Name]
8-Bromo-3-methyl-xanthine | [CAS]
93703-24-3 | [Synonyms]
Linaint-F
8-Bromo-3-methyL
Linagliptin Impurity 97
3-Methyl-8-broMoxanthine
3-Bromo-3-methylxanthine
8-Bromo-3-methyl-xanthine
8-Bromo 2-methyl xanthine
-1H-purine-2,6(3H,7H)-dione
Linagliptin 8-Bromo Impurity
8-Bromo-3-methyl-7H-purine-2,6-dione
8-broMo-3-Methyl-1H-purine-2,6(3H,7H)
8-bromo-3-methyl-1H-purine-2,6(3H,7H)-dione
8-Bromo-3-methyl-xanthine ISO 9001：2015 REACH
8-Bromo-3-methyl-3,9-dihydro-purine-2,6-dione
8-Bromo-3,9-dihydro-3-methyl-1H-purine-2,6-dione
8-Bromo-3-methyl-3,7-dihydro-1H-purine-2,6-dione
1H-Purine-2,6-dione,8-broMo-3,9-dihydro-3-Methyl-
1H-purine-2,6-dione, 8-broMo-3,7-dihydro-3-Methyl-
8-Bromo-3-Methyl-Xanthine / Linagliptin Intermediate
8-bromo-3-methyl-2,3,6,7-tetrahydro-1H-purine-2,6-dione
Linagliptin intermediate 3-Methyl-8-bromoxanthine(india site )
Linagliptin Impurity 1/ Linagliptin 8-bromo impurity (LNG
STG-I)
Linagliptin intermediates，8-Bromo-3-methyl-3,7-dihydropurine- 2,6-dione
8-Bromo-3-methylxanthine 8-Bromo-3-methyl-3,7-dihydropurine-2,6-dione | [EINECS(EC#)]
819-117-0 | [Molecular Formula]
C6H5BrN4O2 | [MDL Number]
MFCD00462528 | [MOL File]
93703-24-3.mol | [Molecular Weight]
245.034 |
| Chemical Properties | Back Directory | [Melting point ]
300°C(lit.) | [density ]
1.974 | [storage temp. ]
Keep in dark place,Inert atmosphere,2-8°C | [solubility ]
DMF (Slightly), DMSO (Slightly) | [form ]
powder to crystal | [pka]
7.65±0.20(Predicted) | [color ]
White to Almost white | [InChI]
InChI=1S/C6H5BrN4O2/c1-11-3-2(8-5(7)9-3)4(12)10-6(11)13/h1H3,(H,8,9)(H,10,12,13) | [InChIKey]
QTEQVEJOXGBDGI-UHFFFAOYSA-N | [SMILES]
N1C2=C(N(C)C(=O)NC2=O)NC=1Br |
| Hazard Information | Back Directory | [Chemical Properties]
Light yellow solid | [Uses]
8-Bromo-3,9-dihydro-3-methyl-1H-purine-2,6-dione, is a substituted derivative of Xanthine (X499950), found in animal organs, yeast, potatoes, coffee beans, tea. It can also be used for the synthesis of Linagliptin (L465900), which is a novel potent and selective dipeptidyl peptidase-4 (DPP-4) inhibitor with potential use in the treatment of type 2 diabetes. | [Synthesis]
Step 1: Synthesis of 8-bromo-3-methyl-3,7-dihydro-1H-purine-2,6-dione
3-Methyl-3,7-dihydro-1H-purine-2,6-dione (11.3 g, 6.8 mmol) was dissolved in acetic acid (300 mL) and sodium acetate (8.37 g, 13.6 mmol) was added. Subsequently, bromine (13.04 g, 8.2 mmol) was added slowly dropwise at 50 °C. After the dropwise addition was completed, the reaction mixture was warmed up to 65 °C with continuous stirring for 3 hours. After completion of the reaction, the mixture was cooled to room temperature and slowly poured into ice water (500 g) to precipitate the product. The precipitate was collected by filtration and the filter cake was washed twice with cold water and finally dried under vacuum to give 8-bromo-3-methyl-3,7-dihydro-1H-purine-2,6-dione (16.1 g, 96.6% yield) as a light yellow solid.LCMS analysis showed a retention time of 0.541 min; LCMS (MH+) m/z: 245. | [References]
[1] Patent: WO2014/143799, 2014, A2. Location in patent: Page/Page column 371
[2] Patent: WO2014/97314, 2014, A1. Location in patent: Page/Page column 3; 8-9; 15
[3] Patent: US2002/28823, 2002, A1
[4] Patent: US2002/103211, 2002, A1
[5] Patent: US6774130, 2004, B2 |
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