4-(5-(4-Fluorophenyl)-3-(4-methoxyphenyl)-4,5-dihydro-1H-pyrazol-1-yl)-4-oxobutanoic acid CAS 337482-93-6
| CAS No. | 337482-93-6 |
| Molecular Formula | C20H19FN2O4 |
| Molecular Weight | 370.37 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 4-(5-(4-Fluorophenyl)-3-(4-methoxyphenyl)-4,5-dihydro-1H-pyrazol-1-yl)-4-oxobutanoic acid (C20H19FN2O4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 12.0, corresponding to approximately 12 ring(s) or double-bond equivalent(s). With a molecular weight of 370.37 g/mol, it falls into the moderately-high-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
4-(5-(4-Fluorophenyl)-3-(4-methoxyphenyl)-4,5-dihydro-1H-pyrazol-1-yl)-4-oxobutanoic acid (CAS 337482-93-6), molecular formula C20H19FN2O4 and molecular weight 370.37 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C20H19FN2O4 |
| Molecular Weight | 370.37 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 DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 2 |
Related Fluorophenyl Standards
- 2-[(3-Fluorophenyl)methyl]-4-(5-methyl-1,2,4-oxadiazol-3-yl)-1H,2H,3H,5H,6H,7H,8H,9H-pyrimido[1,6-a]azepine-1,3-dione (CAS 1775354-05-6)
- 4-[(4-Fluorophenyl)methyl]-3-[1-(furan-2-carbonyl)piperidin-4-yl]-4,5-dihydro-1H-1,2,4-triazol-5-one (CAS 1775410-55-3)
- 2-[(4-Fluorophenyl)methyl]-4-(5-methyl-1,2,4-oxadiazol-3-yl)-1H,2H,3H,5H,6H,7H,8H,9H-pyrimido[1,6-a]azepine-1,3-dione (CAS 1775439-08-1)
- 4-(4-Fluorophenyl)-N-(3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazin-6-yl)piperazine-1-carboxamide (CAS 866137-30-6)
- N-(3-(1-(3-Fluorophenyl)-5-methyl-1H-1,2,3-triazol-4-yl)-1,2,4-thiadiazol-5-yl)furan-2-carboxamide (CAS 931723-35-2)
- N-(2-Fluorophenyl)-6-methyl-4-(4-nitrophenyl)-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carboxamide (CAS 694460-18-9)
- N-(4-fluorophenyl)-2-(3-methyl-5-(trifluoromethyl)-1H-pyrazol-1-yl)thiazole-4-carboxamide (CAS 956753-84-7)
- 1-(2-Fluorophenyl)-4-(naphthalen-2-ylsulfonyl)piperazine (CAS 497060-25-0)
Recommended Standards
- 1,3-Di(benzyloxymethyl)-5-fluorouracil (CAS 75500-03-7)
- 4-Phenyl-5-[3-(trifluoromethyl)benzenesulfonyl]-1,2,3-thiadiazole (CAS 338398-39-3)
- [2-(4-Fluorobenzoyl)-4-methyl-3-oxo-1-phenylpyrazolidin-4-yl]methyl acetate (CAS 329702-39-8)
- 5-Fluoro-1,3-bis(4-methoxybenzyl)pyrimidine-2,4(1H,3H)-dione (CAS 897304-05-1)
- 8-Amino-1-methylquinolin-4(1H)-one (CAS 1355216-26-0)
- 2-chloro-5-methanesulfonylthiophene (CAS 98027-41-9)
- rel-(2S,4S)-Methyl 4-hydroxytetrahydrofuran-2-carboxylate (CAS 2209-09-8)
- 2-Hydroxy-N-methyl-1H-imidazole-1-carboxamide (CAS 61224-25-7)
- 2,3-Dihydro-4H-thieno[2,3-b]thiopyran-4-one 1,1-dioxide (CAS 131352-47-1)
- 2-(Tritylamino)-a-(methoxyimino)-4-thiazoleacetic Acid Hydrochloride (CAS 123333-74-4)
- 2-chloro-N-{2-[4-(difluoromethoxy)phenyl]ethyl}acetamide (CAS 929973-52-4)
- <SC>L</SC>-Glutamic acid-4-<SUP>13</SUP>C (CAS 135053-07-5)
- N-(3-chloro-4-fluorophenyl)-2-((6-methyl-2-(4-phenylpiperazin-1-yl)pyrimidin-4-yl)oxy)acetamide (CAS 1029724-40-0)
- [γ-Glu]15 Semaglutide (CAS CATO-C4X-222690)
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