4-(tert-Butyl) 2-methyl (2R,4R,5S)-5-(4-methoxy-phenyl)tetrahydro-1H-pyrrole-2,4-dicarboxylate CAS 1219423-32-1
| CAS No. | 1219423-32-1 |
| Molecular Formula | C18H25NO5 |
| Molecular Weight | 335.39 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
4-(tert-Butyl) 2-methyl (2R,4R,5S)-5-(4-methoxy-phenyl)tetrahydro-1H-pyrrole-2,4-dicarboxylate (CAS 1219423-32-1), molecular formula C18H25NO5 and molecular weight 335.39 g/mol, is a CATO reference standard with documented purity and traceability.
4-(tert-Butyl) 2-methyl (2R,4R,5S)-5-(4-methoxy-phenyl)tetrahydro-1H-pyrrole-2,4-dicarboxylate (C18H25NO5) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
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.) | 1990 |
| Nitrogen Atoms | 1 |
Recommended Standards
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- 3-{[1-(tert-Butoxycarbonyl)piperidin-3-yl]-methoxy}benzoic acid (CAS 1217862-74-2)
- N-Methoxycarbonyl Normorphine (CAS 1261084-18-7)
- tert-Butyl (1-(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)pyrrolidin-3-yl)carbamate (CAS 1357397-73-9)
- 3-(4-Fluorophenyl)-1H-pyrazole-4-carbaldehyde N-(7-chloro-4-quinolinyl)hydrazone (CAS 477711-39-0)
- 2-(Aminomethyl)pyridin-3-ol (CAS 194665-89-9)
- Biphenyl-3,4'-dicarboxylic acid 3-isopropyl ester (CAS 282727-24-6)
- OTs-C6-OBn (CAS 126519-80-0)
- (D-Arg1,D-Phe5,D-Trp7·9,Leu11)-Substance P (CAS 96736-12-8)
- 4-(Benzylthio)-1,3,5-triazin-2-amine (CAS 212264-29-4)
- (E)-Ethyl 3-(Thiazol-4-Yl)Acrylate (CAS 111601-00-4)
- Methyl 4-amino-3-chloro-2-fluorobenzoate (CAS 875145-53-2)
- Semaglutide impurity 98 (CAS CATO-C4X-222698)
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