Tert-butyl (S)-(3-bromo-6,7-dihydro-5H-pyrazolo[5,1-b][1,3]oxazin-6-yl)carbamate CAS 2409128-69-2
| CAS No. | 2409128-69-2 |
| Molecular Formula | C11H16BrN3O3 |
| Molecular Weight | 318.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
Tert-butyl (S)-(3-bromo-6,7-dihydro-5H-pyrazolo[5,1-b][1,3]oxazin-6-yl)carbamate (CAS 2409128-69-2), molecular formula C11H16BrN3O3 and molecular weight 318.17 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of Tert-butyl (S)-(3-bromo-6,7-dihydro-5H-pyrazolo[5,1-b][1,3]oxazin-6-yl)carbamate (C11H16BrN3O3) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, bromine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a certified reference material (CRM), Tert-butyl (S)-(3-bromo-6,7-dihydro-5H-pyrazolo[5,1-b][1,3]oxazin-6-yl)carbamate meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C11H16BrN3O3 |
| Molecular Weight | 318.17 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2000 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 3 |
Recommended Standards
- tert-Butyl (3-bromo-6,7-dihydro-5H-pyrazolo[5,1-b][1,3]oxazin-6-yl)carbamate (CAS 2238820-25-0)
- Crisaborole lmpurity 95 (CAS CATO-C4X-202195)
- N-[4-(2-Bromoacetyl)phenyl]benzamide (CAS 59659-99-3)
- Flecainide EP Impurity D (CAS 35480-52-5)
- Methyl 5-Formylpyridine-2-carboxylate (CAS 55876-91-0)
- (2E)-2-(Benzenesulfonyl)-3-(4-{[5-(trifluoromethyl)pyridin-2-yl]oxy}phenyl)prop-2-enenitrile (CAS 1025568-00-6)
- N-(5-Cyclopropoxy-2-nitropyridin-3-yl)methanesulfonamide (CAS 1243450-00-1)
- 6-Methoxy-3-methylpyridin-2-amine (CAS 1260663-81-7)
- 6-Chloro-2-(methylthio)-N-phenylpyrimidin-4-amine (CAS 86626-97-3)
- 4-Amino-2,5-difluorobenzeneboronic acid pinacol ester, >97% (CAS 939807-75-7)
- Chloropyramine Impurity 7 HCl (CAS 1135085-85-6)
- (4'-Fluoro-[1,1'-biphenyl]-2-yl)methanamine hydrochloride (CAS 1189729-43-8)
- CH2COOH-PEG9-CH2COOH (CAS 2250056-46-1)
- Neuropeptide Y (3-36) (human, rat) trifluoroacetate salt (CAS 150138-78-6)
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