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CAS No. : | 343-10-2 | MDL No. : | MFCD00973836 |
Formula : | C10H6FNO3 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | KCEJQAATYWQMMQ-UHFFFAOYSA-N |
M.W : | 207.16 | Pubchem ID : | 721205 |
Synonyms : |
|
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P280-P305+P351+P338-P310 | UN#: | N/A |
Hazard Statements: | H302-H315-H319-H332-H335 | Packing Group: | N/A |
GHS Pictogram: |
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* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
53% | A-2; 6-Fluoro-4-hydroxy-quinoline-3-carboxylic acid 6-Fluoro-4-hydroxy-quinoline-3-carboxylic acid (A-2) was synthesized following the general scheme above starting from 4-fluoro-phenylamine. Overall yield (53%). 1H NMR (DMSO-d6) delta 15.2 (br s, 1H), 8.89 (s, 1H), 7.93-7.85 (m, 2H), 7.80-7.74 (m, 1H); ESI-MS 207.9 m/z (MH+). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydroxide; for 2.0h;Reflux; | General procedure: 4-Hydroxyquinoline-3-carboxylic acid ethyl ester (15 g, 69 mmol) was suspended insodium hydroxidesolution (2N, 150 mL) and stirred for 2 h under reflux. After cooling, the mixture was filtered, and the filtrate was acidified to pH 4 with 2N HCl. The resulting precipitate was collected via filtration, washed with water and dried under vacuum to give 4-oxo-1,4-dihydroquinoline-3-carboxylic acid (A-1) as a pale white solid (10.5 g, 92%).1H NMR (d-DMSO) delta 15.34 (s, 1H), 13.42 (s, 1H), 8.89 (s, 1H), 8.28 (d, J=8.0 Hz, 1H), 7.88 (m, 1H), 7.81 (d, J=8.4 Hz, 1H), 7.60 (m, 1H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With pyridine; thionyl chloride; In dichloromethane; benzene; | STEP A N,4-dihydroxy-6-fluoro-N-phenyl-3-quinoline carboxamide 6.2 g of <strong>[343-10-2]4-hydroxy-6-fluoro-3-quinoline carboxylic acid</strong>, 100 ml of anhydrous benzene and 14.28 g of thionyl chloride were refluxed with stirring for 16 hours and then the mixture was cooled. The acid chloride was separated, washed with benzene and dried under reduced pressure at ambient temperature. Small fractions of this product were added with stirring to a mixture cooled to 0 C. of 10 g of N-phenylhydroxylamine, 4.8 ml of pyridine and 50 ml of dichloromethane. The mixture was stirred at ambient temperature for 16 hours and the precipitate was separated, washed with water until chloride ions were eliminated to obtain 6.68 g of N,4-dihydroxy-6-fluoro-N-phenyl-3-quinoline carboxamide which after crystallization from dimethylformamide melted at 260 C. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With dmap; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; In dichloromethane; at 20.0℃; for 6.0h; | General procedure: A solution of 2-(2-methyl-1H-indol-1-yl)ethanamine (4a) (65 mg, 0.373 mmol) and 4-(piperidin-1-yl)benzoic acid (5) (76 mg, 1 eq.), and dimethylaminopyridine (catalytic, ?5 mg) in dichloromethane (6 mL) was added 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide.hydrochloride (EDCI) (92 mg, 1.3 eq.) at room temperature. The resulting reaction mixture was stirred for 6h. At the conclusion of the reaction (TLC), water (15 mL) was added to quench the reaction. The product was extracted with ethyl acetate (20mL×3). Organics were washed with dilute HCl (10 mL), saturated NaHCO3 solution (10 mL), water (10 mL) and brine solution (10 mL) and dried over Na2SO4 and concentrated. The resulting crude product was subjected to silica gel chromatography eluting with 0-40% ethyl acetate in hexane to furnish 7k (TG7-152) (100mg, 74% yield). 1H NMR (CDCl3): delta 7.52 (d, J=5.6Hz, 1H), 7.49 (d, J=8.8Hz, 2H), 7.30 (d, J=8Hz, 1H), 7.07 (m, 2H), 6.80 (d, J=8.2Hz, 2H), 6.23 (s, 1H), 5.98 (t, J=5.4Hz, 1H), 4.33 (t, J=6Hz, 2H), 3.76 (q, J=6Hz, 2H), 3.25 (t, J=4.8Hz, 4H), 2.37 (s, 3H), 1.6 (m, 6H). LCMS (ESI): >97% purity at lambda 254, MS; m/z, 362 [M+H]+. Anal. Calcd. for C23H27N3O: C, 76.42; H, 7.53; N, 11.62; found; C, 76.48; H, 7.55; N, 11.59. |
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