4-(Cyclopentyloxy)-3,5-difluorophenylboronic acid CAS 2096331-93-8
| CAS No. | 2096331-93-8 |
| Molecular Formula | C11H13BF2O3 |
| Molecular Weight | 242.03 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 4-(Cyclopentyloxy)-3,5-difluorophenylboronic acid is closely related to a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine substitution, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
4-(Cyclopentyloxy)-3,5-difluorophenylboronic acid (CAS 2096331-93-8), molecular formula C11H13BF2O3 and molecular weight 242.03 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C11H13BF2O3, 4-(Cyclopentyloxy)-3,5-difluorophenylboronic acid contains a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 242.03 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C11H13BF2O3 |
| Molecular Weight | 242.03 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1997 |
| Halogen Content | F-containing |
Related Cyclopentyloxy Standards
- 3-(Cyclopentyloxy)-2,4-difluorophenylboronic acid (CAS 1629971-64-7)
- 4-(Cyclopentyloxy)-2,3-difluorophenylboronic acid (CAS 2096331-20-1)
- 4-(Cyclopentyloxy)benzene-1-sulfonamide (CAS 1094770-58-7)
- 2-(Cyclopentyloxy)-1,3-difluoro-4-nitrobenzene (CAS 1881288-94-3)
- 1-(Cyclopentyloxy)-2,3-difluoro-4-nitrobenzene (CAS 1881332-23-5)
- (S)-2-(((Cyclopentyloxy)carbonyl)amino)-3,3-dimethylbutanoic acid (CAS 572924-00-6)
- 3-(cyclopentyloxy)-2-methylpropane-1-sulfonyl chloride (CAS 1343617-45-7)
- 2-(Cyclopentyloxy)-5-(trifluoromethyl)aniline (CAS 946719-33-1)
Recommended Standards
- 4-Bromo-3-nitro-1H-pyrrolo[2,3-b]pyridine (CAS 943323-63-5)
- 3-Bromopyrazolo[1,5-c]pyrimidine-5-carboxylic acid (CAS 2383351-78-6)
- 4-Bromo-6-nitro-1H-indazole (CAS 885518-54-7)
- 3-Bromopyrazolo[1,5-a]pyrimidine-5-carboxylic acid (CAS 619306-85-3)
- cis-1-Methyl-7-oxo-3-aza-bicyclo[3.2.0]heptane-3-carboxylic acid tert-butyl ester (CAS 1263378-91-1)
- 3-Chloro-4'-methyl-[1,1'-biphenyl]-2-carboxylic acid (CAS 1261978-99-7)
- Tert-butyl 1-cyano-5-azaspiro[2.5]Octane-5-carboxylate (CAS 1784918-91-7)
- (6-Bromo-1H-indol-3-yl)methanamine (CAS 887581-34-2)
- 4-Methoxy-3,5-diphenylfuran-2(5H)-one (CAS 7596-43-2)
- CI 2201 (CAS 1391486-12-6)
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