N-(3,4-Dichlorophenyl)-5-methyl-11-oxo-5H,5aH,6H,7H,8H,9H,11H-pyrido[2,1-b]quinazoline-3-carboxamide CAS 1574585-05-9
| CAS No. | 1574585-05-9 |
| Molecular Formula | C20H19Cl2N3O2 |
| Molecular Weight | 404.29 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of N-(3,4-Dichlorophenyl)-5-methyl-11-oxo-5H,5aH,6H,7H,8H,9H,11H-pyrido[2,1-b]quinazoline-3-carboxamide is closely related to a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies N-(3,4-Dichlorophenyl)-5-methyl-11-oxo-5H,5aH,6H,7H,8H,9H,11H-pyrido[2,1-b]quinazoline-3-carboxamide (CAS 1574585-05-9), a certified reference material (molecular formula C20H19Cl2N3O2, MW 404.29 g/mol) for analytical method development and quality control.
Based on its molecular formula C20H19Cl2N3O2, N-(3,4-Dichlorophenyl)-5-methyl-11-oxo-5H,5aH,6H,7H,8H,9H,11H-pyrido[2,1-b]quinazoline-3-carboxamide contains a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 404.29 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C20H19Cl2N3O2 |
| Molecular Weight | 404.29 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1993 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
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Recommended Standards
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- 5-Formyl-1H-indazole-3-carbonitrile (CAS 1823867-50-0)
- Methyl 5-nitrofuran-2-carboxylate (CAS 1874-23-3)
- spiro[3.5]nonan-1-one (CAS 29800-45-1)
- 5-[(4,5-Dichloro-1H-imidazol-1-yl)methyl]-2H-1,2,3,4-tetrazole (CAS 680211-57-8)
- Des-Phe22-Tirzepatide (CAS CATO-CPTD788951)
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