1-Cyclopentyl-3-(2,6-difluoro-3,5-dimethoxyphenyl)-7-(methylsulfinyl)-3,4-dihydropyrimido[4,5-d]pyrimidin-2(1H)-one CAS 651734-99-5
| CAS No. | 651734-99-5 |
| Molecular Formula | C20H22F2N4O4S |
| Molecular Weight | 452.47 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 1-Cyclopentyl-3-(2,6-difluoro-3,5-dimethoxyphenyl)-7-(methylsulfinyl)-3,4-dihydropyrimido[4,5-d]pyrimidin-2(1H)-one.
1-Cyclopentyl-3-(2,6-difluoro-3,5-dimethoxyphenyl)-7-(methylsulfinyl)-3,4-dihydropyrimido[4,5-d]pyrimidin-2(1H)-one (CAS 651734-99-5), molecular formula C20H22F2N4O4S and molecular weight 452.47 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C20H22F2N4O4S, 1-Cyclopentyl-3-(2,6-difluoro-3,5-dimethoxyphenyl)-7-(methylsulfinyl)-3,4-dihydropyrimido[4,5-d]pyrimidin-2(1H)-one contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, fluorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 452.47 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
CATO manufactures 1-Cyclopentyl-3-(2,6-difluoro-3,5-dimethoxyphenyl)-7-(methylsulfinyl)-3,4-dihydropyrimido[4,5-d]pyrimidin-2(1H)-one 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 | C20H22F2N4O4S |
| Molecular Weight | 452.47 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; 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.) | 1985 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 1 |
Related Cyclopentyl Standards
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Recommended Standards
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- Methanesulfonic acid, 1,1,1-trifluoro-, 2-[(1S)-1-[[(1,1-dimethylethoxy)carbonyl]amino]-2-phenylethyl]-5-thiazolyl ester (CAS 1355078-29-3)
- DBIBB (CAS 1569309-92-7)
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- 7-Fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)quinoline (CAS 1952262-20-2)
- Empagliflozin impurity 216 (CAS CATO-C4X-1065216)
- 4'-Trifluoromethoxybiphenyl-2-carbaldehyde (CAS 728919-13-9)
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- 6-Bromo-2-phenylquinoline-4-carbohydrazide (CAS 304664-08-2)
- 2,6-Diisopropylphenylboronic Acid (CAS 363166-79-4)
- 3-(Pyridin-4-yl)benzoic acid (CAS 4385-78-8)
- Macrocyclic Peptide flaviviridae Viruses InhibitorDISCONTINUED (CAS 1510841-23-2)
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