3-Phenyl-2-(2-(pyrrolidin-1-yl)ethoxy)-4H-pyrazino[1,2-a]pyrimidin-4-one hydrobromide CAS 21271-24-9
| CAS No. | 21271-24-9 |
| Molecular Formula | C19H20N4O2 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 417.31 g/mol gives 3-Phenyl-2-(2-(pyrrolidin-1-yl)ethoxy)-4H-pyrazino[1,2-a]pyrimidin-4-one hydrobromide distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
3-Phenyl-2-(2-(pyrrolidin-1-yl)ethoxy)-4H-pyrazino[1,2-a]pyrimidin-4-one hydrobromide (CAS 21271-24-9) is a high-purity analytical reference standard with the molecular formula C19H20N4O2HBr and a molecular weight of 417.31 g/mol.
3-Phenyl-2-(2-(pyrrolidin-1-yl)ethoxy)-4H-pyrazino[1,2-a]pyrimidin-4-one hydrobromide (C19H20N4O2HBr) contains a steroid core, an amide group, a hydroxyl group, an ether linkage, bromine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C19H20N4O2 HBr |
| Molecular Weight | 417.31 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 4 |
Related Phenyl Standards
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- 2-[4-(Pyrrolidin-3-yloxy)phenyl]ethylamine (CAS 1000507-30-1)
- 4-(Pyrrolidin-3-yl)-1H-pyrazole (CAS 1000772-62-2)
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Recommended Standards
- (3aS,6aS)-5-Ethoxycarbonyl-1H-hexahydropyrrolo[3,4-b]pyrrole (CAS 1114985-14-6)
- [1,1'-Biphenyl]-2,3'-dicarboxylic acid (CAS 606-75-7)
- 4-Ethyl-N-(furan-2-ylmethyl)benzamide (CAS 777874-24-5)
- ethyl 2-isopropyl-3-methyl-6-oxo-6,7-dihydro-2H-pyrazolo[3,4-b]pyridine-4-carboxylate (CAS 1174858-43-5)
- 2-(3-Chloro-5-(trifluoromethyl)pyridin-2-yl)-2-(4-chlorophenyl)-N-((dimethylamino)methylene)acetamide (CAS 338407-12-8)
- Ethyl 7-bromothieno[2,3-c]pyridine-2-carboxylate (CAS 1835288-51-1)
- 5-Cyclopropoxy-2-methylisonicotinic acid (CAS 1243367-67-0)
- 4-[5-Ethyl-3-(trifluoromethyl)-1H-pyrazol-1-yl]butanoic acid (CAS 1855890-02-6)
- 2-Bromo-N-(isoxazol-3-yl)-N-methylacetamide (CAS 92947-24-5)
- Des-Tyr10-Tirzepatide (CAS CATO-CPTD788680)
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