4-Chloro-6,7-dihydro-5H-cyclopenta[4,5]thieno[2,3-d]pyrimidine CAS 300816-22-2
| CAS No. | 300816-22-2 |
| Molecular Formula | C9H7ClN2S |
| Molecular Weight | 210.68 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 4-Chloro-6,7-dihydro-5H-cyclopenta[4,5]thieno[2,3-d]pyrimidine is closely related to a nitrogen-containing heterocyclic scaffold, a nitrile group, sulfur-containing functionality, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
4-Chloro-6,7-dihydro-5H-cyclopenta[4,5]thieno[2,3-d]pyrimidine (CAS 300816-22-2), molecular formula C9H7ClN2S and molecular weight 210.68 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 4-Chloro-6,7-dihydro-5H-cyclopenta[4,5]thieno[2,3-d]pyrimidine (C9H7ClN2S) contains a nitrogen-containing heterocyclic scaffold, a nitrile group, sulfur-containing functionality, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 210.68 g/mol, it falls into the medium-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), 4-Chloro-6,7-dihydro-5H-cyclopenta[4,5]thieno[2,3-d]pyrimidine 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 | C9H7ClN2S |
| Molecular Weight | 210.68 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Chloro Standards
- 3-Chloro-6-(5-methylthiophen-2-yl)pyridazine (CAS 1105194-98-6)
- 4-Chloro-6-methyl-2-(thiophen-3-yl)pyrimidine (CAS 1153298-12-4)
- 4-Chloro-2-(5-methylthiophen-2-yl)pyrimidine (CAS 1155598-46-1)
- 4-Chloro-2-(3-methylthiophen-2-yl)pyrimidine (CAS 1155599-88-4)
- 5-chloro-3-(2-methylphenyl)-1,2,4-thiadiazole (CAS 1221341-18-9)
- 5-Chloro-3-(3-methylphenyl)-1,2,4-thiadiazole (CAS 1221342-38-6)
- 2-Chloro-6,7-dihydro-5H-cyclopenta[4,5]thieno[2,3-d]pyrimidine (CAS 1225635-21-1)
- 4-Chloro-2-cyclopropylthieno[2,3-d]pyrimidine (CAS 1247422-94-1)
Recommended Standards
- 4-Chloro-2-(methylthio)quinazoline (CAS 58803-74-0)
- 4-Chloro-6-cyclopropylthieno[3,2-d]pyrimidine (CAS 2306265-43-8)
- 4-(Chloromethyl)-2-(pyridin-2-yl)thiazole, 97% (CAS 342025-41-6)
- 4-Chloro-6-methyl-2-(thiophen-2-yl)pyrimidine (CAS 83726-83-4)
- Ethyl 2-(2-bromo-6-ethoxy-4-formylphenoxy)propanoate (CAS 881588-84-7)
- 2-((((1-Propyl-1H-pyrazol-5-yl)methyl)amino)methyl)benzoic acid hydrochloride (CAS 1856056-23-9)
- 2-(1-Methoxyethyl)-6-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (CAS 2760431-34-1)
- (3S,8AS)-3-propyloctahydropyrrolo[1,2-a]pyrazine (CAS 1072102-33-0)
- (-)-Corynantheidine (CAS 23407-35-4)
- 5-methanesulfonyl-1-methyl-1H-pyrazole-4-carboxylic acid (CAS 1227070-38-3)
- 2-(2,4-Difluorophenyl)-1-(1-methyl-1h-pyrazol-4-yl)ethan-1-amine (CAS 1462345-69-2)
- N-Phenyl-2-(2-(trifluoromethyl)quinazolin-4-yl)hydrazinecarboxamide (CAS 414891-74-0)
- 4-Bromo-1-(3-methoxyphenoxy)-2-nitrobenzene (CAS 1253933-36-6)
- Nonapeptide-1 (CAS 158563-45-2)
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