1-(Tert-butyl) 2-ethyl 3-bromo-1H-indole-1,2-dicarboxylate CAS 1135283-20-3
| CAS No. | 1135283-20-3 |
| Molecular Formula | C16H18BrNO4 |
| Molecular Weight | 368.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 1-(Tert-butyl) 2-ethyl 3-bromo-1H-indole-1,2-dicarboxylate (C16H18BrNO4) is characterized by a flavonoid core, an amide group, a hydroxyl group, an ether linkage, bromine substitution. 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).
1-(Tert-butyl) 2-ethyl 3-bromo-1H-indole-1,2-dicarboxylate (CAS 1135283-20-3), molecular formula C16H18BrNO4 and molecular weight 368.22 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C16H18BrNO4 |
| Molecular Weight | 368.22 g/mol |
| Appearance | Pale yellow to 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 1 |
Recommended Standards
- Ethyl 7-bromo-3-(3-ethoxy-3-oxopropyl)-1H-indole-2-carboxylate, 97% (CAS 1073493-75-0)
- Ethyl 6-bromo-4-oxospiro[chromane-2,4'-piperidine]-1'-carboxylate (CAS 1192127-84-6)
- Alectinib Impurity 75 (CAS CATO-C4X-283675)
- tert-Butyl 2-bromo-4-(1,3-dioxoisoindolin-2-yl)butanoate (CAS 128217-88-9)
- 4-oxa-7-azaspiro[2.5]octane hydrochloride (CAS 1427195-23-0)
- (5E)-5-(2,4-Dimethoxybenzylidene)-2-mercapto-3-phenyl-3,5-dihydro-4H-imidazol-4-one 402608-16-6 (CAS 402608-16-6)
- 1-Ethyl-2-((3-(1-ethyl-3,3-dimethyl-5-sulfoindolin-2-ylidene)prop-1-en-1-yl)-3,3-dimethyl-3H-indol-1-ium-5-sulfonate (CAS 765265-69-8)
- Etoricoxib impurity 63 (CAS CATO-C4X-108063)
- 3-Iodo-7-isopropoxy-1H-indazole (CAS 1573123-08-6)
- 7-(Chloromethyl)-2-methylbenzo[b]thiophene (CAS 1234845-02-3)
- 1-(4-Methylbenzyl)piperidin-4-ol (CAS 118327-04-1)
- (4-Bromo-3-phenylisoxazol-5-yl)boronic acid (CAS 13271-76-6)
- 3,4-Dibromofuran-2(5H)-one (CAS 149418-41-7)
- Semaglutide impurity 87 (CAS CATO-C4X-222687)
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