Ethyl 2-(3-cyclopropyl-4-(difluoromethyl)-6-(4-fluorophenyl)-1H-pyrazolo[3,4-b]pyridin-1-yl)acetate CAS 1011376-91-2
| CAS No. | 1011376-91-2 |
| Molecular Formula | C20H18F3N3O2 |
| Molecular Weight | 389.37 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Ethyl 2-(3-cyclopropyl-4-(difluoromethyl)-6-(4-fluorophenyl)-1H-pyrazolo[3,4-b]pyridin-1-yl)acetate (CAS 1011376-91-2) is a high-purity analytical reference standard with the molecular formula C20H18F3N3O2 and a molecular weight of 389.37 g/mol.
The molecular framework of Ethyl 2-(3-cyclopropyl-4-(difluoromethyl)-6-(4-fluorophenyl)-1H-pyrazolo[3,4-b]pyridin-1-yl)acetate (C20H18F3N3O2) is characterized by a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine 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 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.
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 | C20H18F3N3O2 |
| Molecular Weight | 389.37 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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.) | 1988 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 3 |
Related Ethyl Standards
- 2-[3-cyclopropyl-6-(4-ethylphenyl)-4-(trifluoromethyl)-1h-pyrazolo[3,4-b]pyridin-1-yl]acetic acid (CAS 1018143-88-8)
- Ethyl 2-(3-cyclopropyl-4-(difluoromethyl)-6-(1,5-dimethyl-1H-pyrazol-4-yl)-1H-pyrazolo[3,4-b]pyridin-1-yl)acetate (CAS 1171643-63-2)
- 5-cyclopropyl-2-(4-fluorophenyl)-6-(methylsulfonamido)benzofuran-3-carboxylic acid (CAS 691857-54-2)
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- 2-((2-Cyclopropyl-7,8-dimethoxy-2h-chromen-5-yl)methyl)-3-(phenylamino)acrylonitrile (CAS 192315-08-5)
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- 1-(2-(5-Cyclopropyl-3-(thiophen-2-yl)-1H-pyrazol-1-yl)ethyl)-3-(2,6-difluorophenyl)urea (CAS 1797245-09-0)
- N-(2-(5-Cyclopropyl-3-(pyridin-4-yl)-1H-pyrazol-1-yl)ethyl)-2,3-dihydrobenzo[b][1,4]dioxine-2-carboxamide (CAS 1797259-86-9)
Recommended Standards
- (E)-2-(2-((6-(2-Cyanophenoxy)pyrimidin-4-yl)oxy)phenyl)-3-methoxyacrylic Acid (CAS 1185255-09-7)
- N-((S)-4-amino-1-carboxy-4-oxobutyl)-N-glycylglycyl-D-glutamine (CAS CATO-CPTD789027)
- 2-(((Tert-butyldimethylsilyl)oxy)methyl)-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)furo[3,2-b]pyridine (CAS 1188927-49-2)
- Glutamine impurity 2 (CAS CATO-C4X-31862)
- 4-(o-Tolyl)-4H-benzo[b][1,4]thiazine-2-carbonitrile 1,1-dioxide (CAS 1206993-01-2)
- Leucothionin (CAS 34353-37-2)
- N-(6-Amino-1-methyl-2,4-dioxo-3-propyl-1,2,3,4-tetrahydropyrimidin-5-yl)-3-phenylpropanamide (CAS 132940-69-3)
- 7-chloro-3,4-dihydro-2H-1-benzopyran-3-amine (CAS 72358-45-3)
- 1-(1-Methyl-1H-pyrazole-4-sulfonyl)-piperidine-3-carboxylic acid 123274-72-6 2714AD C10H15N3O4S (CAS 123274-72-6)
- 3-(4-Methylbenzyl)-5-((1-phenyl-3-(4-propoxyphenyl)-1H-pyrazol-4-yl)methylene)-2-thioxothiazolidin-4-one (CAS 623935-35-3)
- 5,5-Dimethyl-2,5-dihydro-3,3'-biisoxazole (CAS 502181-53-5)
- 4-(Benzyloxy)-3-bromo-1H-pyrrolo[2,3-b]pyridine4-(Benzyloxy)-3-bromo-7-zazindole (CAS 1427503-54-5)
- Amisulpride Impurity 23 (CAS CATO-C4X-104523)
- Exenatide (CAS 141758-74-9（free base）)
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