Methyl 7-chloro-2-ethyl-5-oxo-5H-chromeno[2,3-b]pyridine-3-carboxylate CAS 338778-37-3
| CAS No. | 338778-37-3 |
| Molecular Formula | C16H12ClNO4 |
| Molecular Weight | 317.72 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Methyl 7-chloro-2-ethyl-5-oxo-5H-chromeno[2,3-b]pyridine-3-carboxylate (C16H12ClNO4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, chlorine 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 317.72 g/mol, it falls into the moderately-high-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Methyl 7-chloro-2-ethyl-5-oxo-5H-chromeno[2,3-b]pyridine-3-carboxylate (CAS 338778-37-3), molecular formula C16H12ClNO4 and molecular weight 317.72 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.
CATO manufactures Methyl 7-chloro-2-ethyl-5-oxo-5H-chromeno[2,3-b]pyridine-3-carboxylate under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C16H12ClNO4 |
| Molecular Weight | 317.72 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 | Cl-containing |
| Nitrogen Atoms | 1 |
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Recommended Standards
- Ethyl 7-chloro-2-methyl-5-oxo-5H-chromeno[2,3-b]pyridine-3-carboxylate (CAS 68301-92-8)
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- Diethyl 2-(5-fluoro-2,4-dinitrophenyl)malonate (CAS 893620-45-6)
- 3-(Trifluoromethyl)benzoyl cyanide (CAS 77173-53-6)
- (S)-N-(2-Amino-2-oxoethyl)-1-((S)-2-amino-5-guanidinopentanoyl)pyrrolidine-2-carboxamide (CAS 52699-98-6)
- Dimethyl 5-Chloro-2-methoxybenzene-1,3-dicarboxylate (CAS 1421840-17-6)
- 7-Bromo-4,4-difluoro-1,2,3,4-tetrahydroisoquinoline (CAS 1780338-53-5)
- (2-Methoxy-5-methylphenyl)(1-methyl-1H-pyrrol-2-yl)methanol (CAS 1443341-58-9)
- (3-Fluoro-4-(trifluoromethoxy)phenyl)(methyl)sulfane (CAS 1443312-18-2)
- 4,5,5-Trimethyl-3-(methylthio)-4,5-dihydro-1H-1,2,4-triazole (CAS 745761-69-7)
- Ethyl 2-(diisobutoxyphosphoryl)-3,3,3-trifluoro-2-((4-methylphenyl)sulfonamido)propanoate (CAS 255872-07-2)
- Vasonatrin Peptide (VNP) trifluoroacetate salt (CAS 141676-35-9)
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