O5-tert-butyl O6-ethyl 3-bromo-6,7-dihydro-4H-pyrazolo[1,5-a]pyrazine-5,6-dicarboxylate CAS 1250991-64-0
| CAS No. | 1250991-64-0 |
| Molecular Formula | C14H20BrN3O4 |
| Molecular Weight | 374.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
O5-tert-butyl O6-ethyl 3-bromo-6,7-dihydro-4H-pyrazolo[1,5-a]pyrazine-5,6-dicarboxylate (C14H20BrN3O4) contains a nitrogen-containing heterocyclic scaffold, 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).
O5-tert-butyl O6-ethyl 3-bromo-6,7-dihydro-4H-pyrazolo[1,5-a]pyrazine-5,6-dicarboxylate (CAS 1250991-64-0), molecular formula C14H20BrN3O4 and molecular weight 374.23 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C14H20BrN3O4 |
| Molecular Weight | 374.23 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 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 3 |
Recommended Standards
- (S)-4-benzyl-3-(2-(3-bromophenyl)acetyl)oxazolidin-2-one (CAS 1207989-32-9)
- O5-tert-butyl O4-ethyl 3-bromo-6,7-dihydro-4H-pyrazolo[1,5-a]pyrazine-4,5-dicarboxylate (CAS 1250997-04-6)
- 5'-Amino-4-bromo-[1,1':3',1''-terphenyl]-4',6'-dicarbonitrile (CAS 119452-41-4)
- 5-tert-Butyl 2-ethyl 3-bromo-6,7-dihydropyrazolo[1,5-a]pyrazine-2,5(4H)-dicarboxylate (CAS 1301713-97-2)
- 2-(5-Fluoro-2-isobutoxyphenyl)ethan-1-ol (CAS 1443335-96-3)
- 2-Isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 61676-62-8)
- 3-Chloro-6-(4,6-dimethylpyrimidin-2-yl)furo[2,3-c]pyridin-2(6H)-one (CAS 61603-38-1)
- N-[(1R,2R)-2-[[[[(1R,2R)-2-(Dimethylamino)cyclohexyl]amino]thioxomethyl]amino]-1,2-diphenylethyl]-3,5-bis(trifluoromethyl)benzenesulfonamide (CAS 1020665-73-9)
- Methyl 2-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)nicotinate (CAS 1622217-20-2)
- 6-Acetyl-2-(4-methoxyphenyl)-1,2,4-triazine-3,5(2H,4H)-dione (CAS 477854-31-2)
- 3-Methoxy-4-nitropicolinonitrile (CAS 348635-36-9)
- Methyl 2-((4-chloropyrimidin-5-yl)oxy)-5-fluorobenzoate (CAS 2169920-28-7)
- 3-(Dibutylamino)propanenitrile (CAS 25726-99-2)
- Semaglutide Impurity 164 (CAS CATO-C4X-2226164)
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