203661-69-2 7-Azaspiro[3.5]nonane-7-carboxylic acid, 2-oxo-, 1,1-dimethylethyl ester CAS 203661-69-2
| CAS No. | 203661-69-2 |
| Molecular Formula | C13H21NO3 |
| Molecular Weight | 239.31 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
203661-69-2 7-Azaspiro[3.5]nonane-7-carboxylic acid, 2-oxo-, 1,1-dimethylethyl ester (CAS 203661-69-2), molecular formula C13H21NO3 and molecular weight 239.31 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 203661-69-2 7-Azaspiro[3.5]nonane-7-carboxylic acid, 2-oxo-, 1,1-dimethylethyl ester (C13H21NO3) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C13H21NO3 |
| Molecular Weight | 239.31 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2015 |
| Nitrogen Atoms | 1 |
Related Azaspiro Standards
- 2-Boc-2-azaspiro[3.5]nonan-7-one (CAS 1363381-22-9)
- 4-Oxo-4-(8-azaspiro[4.5]decan-8-yl)butanoic acid (CAS 1501017-83-9)
- 6-Boc-6-azaspiro[3.4]octane-2-carbaldehyde (CAS 203662-55-9)
- 3-Oxo-7-azaspiro[3.5]nonane-7-carboxylate tert-butyl ester 849203-60-7 1-Oxo-7-Boc-7-azaspiro[3.5]nonane (CAS 849203-60-7)
- 2-(2-Azaspiro[3.3]heptan-6-yloxy)-1-morpholinoethanone (CAS 1707364-58-6)
- 2-Benzyl-2-azaspiro[4.4]Nonane-6-carbonitrile (CAS 1357353-06-0)
- 4-(8-Oxo-1-azaspiro[4.4]non-6-en-1-yl)benzonitrile (CAS 2007908-55-4)
- 7-Boc-7-azaspiro[3.5]nonan-2-ol (CAS 240401-28-9)
Recommended Standards
- Tetrahydro-4H-thiopyran-4-one O-(3-fluorobenzyl) oxime (CAS 866155-15-9)
- 4H-Cyclopenta[b]thiophene-3-carboxylic acid, 5,6-dihydro-2-isothiocyanato-, methyl ester (9CI) 588676-82-8 (CAS 588676-82-8)
- Tert-butyl7-oxo-1-azaspiro[3.5]nonane-1-carboxylate (CAS 2306264-15-1)
- Tert-butyl6-oxo-2-azaspiro[3.5]nonane-2-carboxylate (CAS 2306275-77-2)
- 1-Bromo-3-(2-chlorophenyl)propan-2-one (CAS 651358-39-3)
- 3-Bromo-5-chloro-2-ethynylpyridine (CAS 1211528-84-5)
- Tert-butyl methyl adipate (CAS 52221-08-6)
- Tert-butyl n-(4,4,4-trifluoro-3-hydroxy-1-phenylbutan-2-yl)carbamate (CAS 1311317-58-4)
- 5-Cyclopropoxy-6-nitronicotinaldehyde (CAS 1243465-12-4)
- 1-(2,2-Dimethoxypropyl)-3-nitro-1h-pyrazole (CAS 1240566-63-5)
- 2-Methoxy-3-nitro-4-picoline (CAS 160590-36-3)
- 4,4-Dimethylpentane-2,3-dione (CAS 40898-19-9)
- Methyl 2-phenylaminonicotinate, 97% (CAS 51269-84-2)
- Semaglutide impurity 71 (CAS CATO-C4X-222671)
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