(3R,4S)-3-(1-Ethoxyethoxy)-2-oxo-4-phenyl-1-azetidinecarboxylic Acid 1,1-Dimethylethyl Ester CAS 201856-57-7
| CAS No. | 201856-57-7 |
| Molecular Formula | C18H25NO5 |
| Molecular Weight | 335.39 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
(3R,4S)-3-(1-Ethoxyethoxy)-2-oxo-4-phenyl-1-azetidinecarboxylic Acid 1,1-Dimethylethyl Ester (CAS 201856-57-7), molecular formula C18H25NO5 and molecular weight 335.39 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of (3R,4S)-3-(1-Ethoxyethoxy)-2-oxo-4-phenyl-1-azetidinecarboxylic Acid 1,1-Dimethylethyl Ester (C18H25NO5) is characterized by a flavonoid core, an amide 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).
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 | C18H25NO5 |
| Molecular Weight | 335.39 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 methanol, acetonitrile, DMSO, water (slightly soluble) |
| 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.) | 2014 |
| Nitrogen Atoms | 1 |
Recommended Standards
- (2S,5S)-2-Benzyl 1-tert-butyl 5-hydroxypiperidine-1,2-dicarboxylate (CAS 934711-71-4)
- (5S)-5,6-Anhydro-2,3,4-trideoxy-2-[[(phenylmethoxy)carbonyl]amino]-L-glycero-hexonic acid tert-Butyl Ester (CAS 204074-52-2)
- (2S,4S)-1-(tert-butoxycarbonyl)-4-(3,5-dimethylphenoxy)pyrrolidine-2-carboxylic acid (CAS 869682-05-3)
- 1-(Tert-butyl) 2-methyl (2R,4R)-4-(benzyloxy)pyrrolidine-1,2-dicarboxylate (CAS 250122-38-4)
- (S)-cyclopropyl(pyridin-3-yl)methanamine (CAS 1213680-69-3)
- 2-(Azepan-4-yl)acetic acid hydrochloride (CAS 2098128-87-9)
- 2-(1-Ethyl-1h-pyrazol-4-yl)propan-2-amine (CAS 1236835-13-4)
- (2E,3E)-2-[2-(3,5-Dichlorophenyl)hydrazin-1-ylidene]-3-hydrazinylidene-1-(4-methylphenyl)propan-1-one (CAS 338400-42-3)
- 2-[2-(3,5-Dimethyl-piperidin-1-yl)-ethoxy]-phenylamine (CAS 919036-85-4)
- Succinyl-beta-cyclodextrin (CAS 957494-34-7)
- 2-BROMO-5-FORMYLTHIOPHENE 2-FORMYL-5-BROMOTHIOPHENE 4701-17-1 5-BROMOTHENALDEHYDE 5-BROMOTHIOPHENE-2-ALDEHYDE 5-BROMOTHIOPHENE-2-CARBOXALDEHYDE BC003561 (CAS 4701-17-1)
- 6-Methoxy-4-oxo-1-propyl-1,4-dihydroquinoline-3-carboxylic acid (CAS 1092289-07-0)
- 5-Chloro-6-(prop-2-yn-1-ylamino)nicotinic acid (CAS 1019357-55-1)
- Semaglutide Impurity 131 (CAS 2618647-80-4)
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