2-((2-(4-Chlorophenyl)-2-oxoethyl)thio)-3-methyl-3,5,6,7-tetrahydro-4H-cyclopenta[4,5]thieno[2,3-d]pyrimidin-4-one CAS 371933-83-4
| CAS No. | 371933-83-4 |
| Molecular Formula | C18H15ClN2O2S2 |
| Molecular Weight | 390.91 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 390.91 g/mol gives 2-((2-(4-Chlorophenyl)-2-oxoethyl)thio)-3-methyl-3,5,6,7-tetrahydro-4H-cyclopenta[4,5]thieno[2,3-d]pyrimidin-4-one distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 2-((2-(4-Chlorophenyl)-2-oxoethyl)thio)-3-methyl-3,5,6,7-tetrahydro-4H-cyclopenta[4,5]thieno[2,3-d]pyrimidin-4-one (CAS 371933-83-4), a certified reference material (molecular formula C18H15ClN2O2S2, MW 390.91 g/mol) for analytical method development and quality control.
Structurally, 2-((2-(4-Chlorophenyl)-2-oxoethyl)thio)-3-methyl-3,5,6,7-tetrahydro-4H-cyclopenta[4,5]thieno[2,3-d]pyrimidin-4-one (C18H15ClN2O2S2) contains a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 12.0, corresponding to approximately 12 ring(s) or double-bond equivalent(s). With a molecular weight of 390.91 g/mol, it falls into the moderately-high-molecular-weight range. 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).
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.
As a certified reference material (CRM), 2-((2-(4-Chlorophenyl)-2-oxoethyl)thio)-3-methyl-3,5,6,7-tetrahydro-4H-cyclopenta[4,5]thieno[2,3-d]pyrimidin-4-one meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C18H15ClN2O2S2 |
| Molecular Weight | 390.91 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°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.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 2 |
Related Chlorophenyl Standards
- 4-[(4-Chlorophenyl)sulfanyl]-6-(methanesulfonylmethyl)-2-phenylpyrimidine (CAS 478031-54-8)
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- N-(4-(4-chlorophenyl)thiazol-2-yl)-2-((4-methoxyphenyl)thio)acetamide (CAS 338966-03-3)
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- 2-((5-(4-Chlorophenyl)-1,3,4-oxadiazol-2-yl)thio)-N-(1-cyanocyclohexyl)propanamide (CAS 875864-22-5)
- 4-(4-(4-Chlorophenyl)thiazol-2-yl)-N-phenylbenzamide (CAS 338408-14-3)
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Recommended Standards
- 5-Chloro NNEI (CAS 1800101-23-8)
- 2-((4-Allyl-5-(thiophen-2-yl)-4H-1,2,4-triazol-3-yl)thio)-N-(3-chlorophenyl)acetamide (CAS 578697-14-0)
- 2,2＇,5-Tribromobiphenyl (CAS 59080-34-1)
- 2-((4-Allyl-5-(thiophen-2-yl)-4H-1,2,4-triazol-3-yl)thio)-N-(4-chlorophenyl)acetamide (CAS 377065-80-0)
- 2-Chloro-6-methylthieno[3,2-d]pyrimidin-4(3H)-one (CAS 1429629-67-3)
- N-(2,5-Dichlorobenzyl)propan-2-amine (CAS 1152879-31-6)
- 7-(4-Bromophenyl)-2-chloro-6-(4-methoxyphenyl)-7,12-dihydro-6H-chromeno[4,3-d][1,2,4]triazolo[1,5-a]pyrimidine (CAS 303094-16-8)
- Methyl 5-((2-ethoxyphenyl)carbamoyl)-4-methyl-2-(2-phenoxyacetamido)thiophene-3-carboxylate (CAS 335408-52-1)
- 1-(4-Hydroxyphenyl)-1H-pyrrole-2,5-dione (CAS 7300-91-6)
- (1-Ethoxy-2,2,2-trifluoroethoxy)triethylsilane (CAS 1254592-76-1)
- N,N-diethyl-2-(4-formylphenoxy)acetamide (CAS 685853-68-3)
- Ethyl 2-butyl-1H-indole-6-carboxylate (CAS 491601-40-2)
- 1-Acetyl-N-phenyl-2-vinylcyclopropanecarboxamide (CAS 78162-16-0)
- Semaglutide impurity 244(Fmoc-His(Fmoc)-Aib-OH) (CAS CATO-C4X-2226244)
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