2-[4-(5-Methyl-1,2,4-oxadiazol-3-yl)-1,3-dioxo-1H,2H,3H,5H,6H,7H,8H,9H-pyrimido[1,6-a]azepin-2-yl]-N-[3-(methylsulfanyl)phenyl]acetamide CAS 1775444-74-0
| CAS No. | 1775444-74-0 |
| Molecular Formula | C21H23N5O4S |
| Molecular Weight | 441.50 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 2-[4-(5-Methyl-1,2,4-oxadiazol-3-yl)-1,3-dioxo-1H,2H,3H,5H,6H,7H,8H,9H-pyrimido[1,6-a]azepin-2-yl]-N-[3-(methylsulfanyl)phenyl]acetamide.
2-[4-(5-Methyl-1,2,4-oxadiazol-3-yl)-1,3-dioxo-1H,2H,3H,5H,6H,7H,8H,9H-pyrimido[1,6-a]azepin-2-yl]-N-[3-(methylsulfanyl)phenyl]acetamide (CAS 1775444-74-0) is a high-purity analytical reference standard with the molecular formula C21H23N5O4S and a molecular weight of 441.50 g/mol.
2-[4-(5-Methyl-1,2,4-oxadiazol-3-yl)-1,3-dioxo-1H,2H,3H,5H,6H,7H,8H,9H-pyrimido[1,6-a]azepin-2-yl]-N-[3-(methylsulfanyl)phenyl]acetamide (C21H23N5O4S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C21H23N5O4S |
| Molecular Weight | 441.50 g/mol |
| 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 |
| Degree of Unsaturation (DBE) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1994 |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 1 |
Related Methyl Standards
- 2-[4-(5-Ethyl-1,2,4-oxadiazol-3-yl)-1,3-dioxo-1H,2H,3H,5H,6H,7H,8H,9H-pyrimido[1,6-a]azepin-2-yl]-N-[(4-fluorophenyl)methyl]acetamide (CAS 1775345-84-0)
- 2-[4-(5-Ethyl-1,2,4-oxadiazol-3-yl)-1,3-dioxo-1H,2H,3H,5H,6H,7H,8H,9H-pyrimido[1,6-a]azepin-2-yl]-N-(3-fluoro-4-methylphenyl)acetamide (CAS 1775353-92-8)
- 1-(3-(3-Phenyl-1,2,4-oxadiazol-5-yl)pyridin-2-yl)-N-(pyridin-3-ylmethyl)piperidine-4-carboxamide (CAS 1251674-31-3)
- 2-[4-(5-Ethyl-1,2,4-oxadiazol-3-yl)-1,3-dioxo-1H,2H,3H,5H,6H,7H,8H-pyrido[1,2-c]pyrimidin-2-yl]-N-[(4-methoxyphenyl)methyl]acetamide (CAS 1775308-30-9)
- 2-[4-(5-Ethyl-1,2,4-oxadiazol-3-yl)-1,3-dioxo-1H,2H,3H,5H,6H,7H,8H,9H-pyrimido[1,6-a]azepin-2-yl]-N-(3-methoxyphenyl)acetamide (CAS 1775386-91-8)
- 2-[4-(5-Ethyl-1,2,4-oxadiazol-3-yl)-1,3-dioxo-1H,2H,3H,5H,6H,7H,8H,9H-pyrimido[1,6-a]azepin-2-yl]-N-(2-methoxyphenyl)acetamide (CAS 1775402-99-7)
- 2-[4-(5-Ethyl-1,2,4-oxadiazol-3-yl)-1,3-dioxo-1H,2H,3H,5H,6H,7H,8H,9H-pyrimido[1,6-a]azepin-2-yl]-N-(4-methoxyphenyl)acetamide (CAS 1775454-86-8)
- 2-[4-(5-Ethyl-1,2,4-oxadiazol-3-yl)-1,3-dioxo-1H,2H,3H,5H,6H,7H,8H-pyrido[1,2-c]pyrimidin-2-yl]-N-[(3-methoxyphenyl)methyl]acetamide (CAS 1775553-51-9)
Recommended Standards
- (S)-5-(4-(3,5-Dimethylisoxazol-4-yl)-2-(pyrrolidin-3-yloxy)phenyl)-2-ureidothiophene-3-carboxamide (CAS 1609281-86-8)
- N-(2-Fluorophenyl)-2-((3-(4-methoxyphenyl)-4-oxo-3,4-dihydrothieno[3,2-d]pyrimidin-2-yl)thio)acetamide (CAS 1795413-34-1)
- Ethyl 4-6-O-benzylidene-2-deoxy-2-phthalimido-β-D-thioglucopyranoside (CAS 129519-28-4)
- 2-((N-(2-Methoxyphenyl)-4-methylphenyl)sulfonamido)-N-(4-methoxypyridin-3-yl)acetamide (CAS 1890208-58-8)
- 2-Bromo-4-cyclopropoxy-N-methylbenzamide (CAS 1243347-72-9)
- (2s,4s)-1-(((9h-Fluoren-9-yl)methoxy)carbonyl)-4-(trifluoromethyl)pyrrolidine-2-carboxylic acid (CAS 1242934-32-2)
- 2-(2,4-Dimethylpiperazin-1-yl)ethanamine (CAS 1353982-77-0)
- 5-Amino-2-methyl-3-nitrobenzamide. Short expiry date due to chemical nature of component(s) (CAS 90223-31-7)
- 3-Methyl-4-(pyridin-4-yloxy)aniline (CAS 871020-28-9)
- H-Gly-Gly-β-Ala-OH (CAS 42538-53-4)
- Methyl 3-(((tert-butoxycarbonyl)amino)methyl)imidazo[1,2-a]pyridine-6-carboxylate (CAS 1350475-28-3)
- Loratadine Impurity 93 (CAS CATO-C4X-142693)
- N-Ethyl-2-(2-oxo-2,3-dihydro-1H-imidazol-4-yl)acetamide (CAS 952734-14-4)
- Insulin Degludec Impurity 10 (CAS CATO-C4X-215710)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com