(R)-Ethyl 4-(4-bromophenyl)-3-((tert-butoxycarbonyl)amino)butanoate CAS 1257446-29-9
| CAS No. | 1257446-29-9 |
| Molecular Formula | C17H24BrNO4 |
| Molecular Weight | 386.28 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including (R)-Ethyl 4-(4-bromophenyl)-3-((tert-butoxycarbonyl)amino)butanoate.
(R)-Ethyl 4-(4-bromophenyl)-3-((tert-butoxycarbonyl)amino)butanoate (CAS 1257446-29-9) is a high-purity analytical reference standard with the molecular formula C17H24BrNO4 and a molecular weight of 386.28 g/mol.
Structurally, (R)-Ethyl 4-(4-bromophenyl)-3-((tert-butoxycarbonyl)amino)butanoate (C17H24BrNO4) contains a steroid core, an amide group, a hydroxyl group, an ether linkage, bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 386.28 g/mol, it falls into the moderately-high-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
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 | C17H24BrNO4 |
| Molecular Weight | 386.28 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 1 |
Recommended Standards
- tert-Butyl 4-(4-bromo-2-methoxyphenoxy)piperidine-1-carboxylate (CAS 1228957-01-4)
- Methyl 2-(3-bromobenzyl)-3-((tert-butoxycarbonyl)(methyl)amino)propanoate (CAS 1416439-50-3)
- tert-Butyl 4-(4-bromo-3-methoxyphenoxy)piperidine-1-carboxylate (CAS 1173006-38-6)
- 4-(4-Bromophenyl)-2,6-diphenylpyridine (CAS 1498-81-3)
- 3-Cyclopropylthiophene-2-carbaldehyde (CAS 29481-31-0)
- 4-Ethoxy-2,3-dimethylbenzoic acid (CAS 1216009-33-4)
- Tert-butyl 4-hydroxy-4-(2-methoxyphenyl)piperidine-1-carboxylate (CAS 201609-28-1)
- 2-Bromo-5-(1-isopropylpiperidin-2-yl)pyridine (CAS 1352508-36-1)
- 2,2-Bis(2-chloro-5-nitrophenyl)acetonitrile hydrate (CAS 1272756-60-1)
- 3-(2,5-dimethoxyphenyl)propan-1-amine (CAS 56966-37-1)
- 1-(4-Methoxybenzyl)-1H-pyrazol-4-amine (CAS 1152867-10-1)
- (2S,3S)-3-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-2-hydroxy-3-(2-methoxyphenyl)propanoic acid (CAS 959576-01-3)
- (S)-5-Oxo-5-((1-oxo-3-phenyl-1-(quinolin-6-ylamino)propan-2-yl)amino)pentanoic acid (CAS 80115-54-4)
- Semaglutide Impurity 160 (x TFA Salt) (CAS CATO-C4X-2226160)
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