Butyl 7-fluoro-2-methyl-5-oxo-5H-chromeno[2,3-b]pyridine-3-carboxylate CAS 306976-34-1
| CAS No. | 306976-34-1 |
| Molecular Formula | C18H16FNO4 |
| Molecular Weight | 329.32 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Butyl 7-fluoro-2-methyl-5-oxo-5H-chromeno[2,3-b]pyridine-3-carboxylate is closely related to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Butyl 7-fluoro-2-methyl-5-oxo-5H-chromeno[2,3-b]pyridine-3-carboxylate (CAS 306976-34-1), molecular formula C18H16FNO4 and molecular weight 329.32 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, Butyl 7-fluoro-2-methyl-5-oxo-5H-chromeno[2,3-b]pyridine-3-carboxylate (C18H16FNO4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 329.32 g/mol, it falls into the moderately-high-molecular-weight range. 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).
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.
As a certified reference material (CRM), Butyl 7-fluoro-2-methyl-5-oxo-5H-chromeno[2,3-b]pyridine-3-carboxylate 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 | C18H16FNO4 |
| Molecular Weight | 329.32 g/mol |
| Appearance | Pale yellow to 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, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; 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.) | 2025 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 1 |
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Recommended Standards
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- (E)-3-[4-(3-fluoropropoxy)phenyl]-1-(4-nitrophenyl)-2-propen-1-one 477870-96-5 KS-00001TVE (CAS 477870-96-5)
- 1-(3-Chlorophenyl)-2-oxo-1,2-dihydropyridine-3-carboxylic acid (CAS 1268028-62-1)
- 2-Cyclopropoxy-6-methylaniline (CAS 1243391-10-7)
- (3R)-3-fluoroazepane (CAS 2166031-66-7)
- 8-Methoxypyrimido[4,5-b]quinolin-2-amine (CAS 1098340-26-1)
- N'-(Furan-2-ylmethylene)-4-methylbenzohydrazide (CAS 113906-79-9)
- (2S)-3-Phenyl-N1-[5,6,7,8-tetrahydro-2-(4-pyridinyl)[1]benzothieno[2,3-d]pyrimidin-4-yl]-1,2-propanediamine (CAS 1438881-19-6)
- 3-(Azetidin-3-ylmethyl)-1-methyl-1h-indazole (CAS 1499376-86-1)
- Benzenamine, 3-(1-cyclopropyl-5-fluoro-1H-benzimidazol-2-yl)-2-methyl- (CAS 1354962-68-7)
- Methyl 2-amino-3-((4-methoxybenzyl)oxy)quinoline-6-carboxylate (CAS 2435612-38-5)
- Tirzepatide Impurity 25 X TFA Salt (CAS CATO-C4X-324025)
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