Ethyl 3-(2-((3,5,6-trimethyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidin-2-yl)thio)acetamido)benzoate CAS 333406-78-3
| CAS No. | 333406-78-3 |
| Molecular Formula | C20H21N3O4S2 |
| Molecular Weight | 431.53 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Ethyl 3-(2-((3,5,6-trimethyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidin-2-yl)thio)acetamido)benzoate is closely related to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies Ethyl 3-(2-((3,5,6-trimethyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidin-2-yl)thio)acetamido)benzoate (CAS 333406-78-3), a certified reference material (molecular formula C20H21N3O4S2, MW 431.53 g/mol) for analytical method development and quality control.
The molecular framework of Ethyl 3-(2-((3,5,6-trimethyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidin-2-yl)thio)acetamido)benzoate (C20H21N3O4S2) is characterized by a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
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 | C20H21N3O4S2 |
| Molecular Weight | 431.53 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 2 |
Related Ethyl Standards
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Recommended Standards
- Ethyl 3-((4-(pyridin-2-yl)piperazin-1-yl)sulfonyl)benzo[b]thiophene-2-carboxylate (CAS 932464-69-2)
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- ditert-butyl 6-formyl-7-methyl-spiro[3,4-dihydro-1,8-naphthyridine-2,3'-pyrrolidine]-1,1'-dicarboxylate (CAS 2755893-32-2)
- N-(3-cyano-4,5,6,7-tetrahydrobenzo[b]thiophen-2-yl)-2-((5-cyano-[2,3'-bipyridin]-6-yl)thio)acetamide (CAS 445383-46-0)
- tert-Butyl 3-oxo-4-phenyl-2,8-diazaspiro[4.5]decane-8-carboxylate (CAS 1356108-83-2)
- tert-butyl N-({1-[3-(aminomethyl)phenyl]-1H-1,2,3-triazol-4-yl}methyl)carbamate (CAS 2060041-97-4)
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- 6-Bromo-3-ethyl-1-methyl-3,4-dihydroquinoxalin-2(1H)-one (CAS 1499036-47-3)
- Benzyl valinate (CAS 17645-51-1)
- 8-Aminoisoquinoline-5-carboxylic acid (CAS 1936191-65-9)
- (R)-2,2-dimethyl-3-(3-oxohexahydroimidazo[1,5-a]pyrazin-2(3H)-yl)propanoic acid compound with 2,2,2-trifluoroacetic acid (1:1) (CAS 2306252-88-8)
- 8-(Boc-amino)-1,4-dioxaspiro[4.5]decane-8-carboxylic Acid (CAS 886362-27-2)
- 5-amino-N-methyl-1H-indole-2-carboxamide hydrochloride (CAS 1803587-15-6)
- Peptide Fmoc-Thi-Thi-OH (CAS CATO-CPTD788552)
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