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CAS No. : | 22864-65-9 | MDL No. : | MFCD07369717 |
Formula : | C8H8F3N | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | UTUYWZJPVLDHJJ-UHFFFAOYSA-N |
M.W : | 175.15 | Pubchem ID : | 15099755 |
Synonyms : |
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Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P280 | UN#: | N/A |
Hazard Statements: | H302-H317 | Packing Group: | N/A |
GHS Pictogram: |
* 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 |
---|---|---|
65% | With thionyl chloride; triethylamine; In dichloromethane; | EXAMPLE 8 N-Methyl-N-(4-trifluoromethyl-phenyl)-1,2-dihydro-4-hydroxy-5-methoxy-1-methyl-2-oxo-quinoline-3-carboxamide (Method B) To an ice-cold solution of 1,2-dihydro-4-hydroxy-5-methoxy-1-methyl-2-oxo-quinoline-3-carboxylic acid (8 g, 0.032 mol), triethylamine (15.5 ml, 0.11 mol) and 4-trifluoromethyl-N-methylaniline (6.1 g, 0.035 mol) in 150 ml of methylene chloride was added dropwise during 0.5 hours a solution of thionyl chloride (3.0 ml, 0.042 mol) in 10 ml of methylene chloride. The stirring was continued at 4° C. for 4 hours. The solution was diluted with 10 ml of methylene chloride, washed with cold 1 M sulphuric acid and then extracted with 1 M sodium hydroxide. The pH of the aqueous phase was adjusted to 8-8.5, clarified by filtration and then acidified with hydrochloric acid to pH 4. On standing a crystalline precipitate was formed which was filtered off, washed with water and dried to give the title compound (8.5 g) yield 65percent. 1H NMR (CDCl3) delta 3.48 (3H, s), 3.54 (3H, s), 4.06 (3H, s), 6.70 (1H, d), 6.94 (1H, d), 7.46 (1H, t), 7.50 (4H, broad signal). 13C NMR (CDCl3) delta 29.8 (CH3), 36.9 (CH3), 56.9 (CH3), 103.5 (CH), 104.2 (C), 108.7 (CH), 109.5 (C), 117.3+121.7+126.0+130.3 (C), 125.8+125.9+125.9+126.0 (CH), 126.3 (CH), 127.9+128.4+128.9+129.4 (C), 131.8 (CH), 141.4 (C), 146.7 (C), 157.2 (C), 158.0 (C), 160.3 (C), 165.0 (C); some peaks are multiplets due to F-coupling. ESI MS/MS [M+H]+ 407, fragment 232. |
65% | With thionyl chloride; triethylamine; In dichloromethane; at 0 - 4℃; for 4.5h; | To an ice-cold solution of 1,2-dihydro-4-hydroxy-5-methoxy-1-methyl-2-oxo-quinoline-3-carboxylic acid (8 g, 0.032 mol), triethylamine (15.5 ml, 0.11 mol) and 4-trifluoromethyl-N-methylaniline (6.1 g, 0.035 mol) in 150 ml of methylene chloride was added dropwise during 0.5 hours a solution of thionyl chloride (3.0 ml, 0.042 mol) in 10 ml of methylene chloride. The stirring was continued at 4°C for 4 hours. The solution was diluted with 10 ml of methylene chloride, washed with cold 1 M sulphuric acid and then extracted with 1 M sodium hydroxide. The pH of the aqueous phase was adjusted to 8-8.5, clarified by filtration and then acidified with hydrochloric acid to pH 4. On standing a crystalline precipitate was formed which was filtered off, washed with water and dried to give the title compound (8.5 g) yield 65 percent. 1H NMR (CDCl3) delta 3.48 (3H, s), 3.54 (3H, s), 4,06 (3H, s), 6.70 (1H, d), 6.94 (1H, d), 7.46 (1H, t), 7.50 (4H, broad signal). 13C NMR (CDCl3) delta 29.8 (CH3), 36.9 (CH3), 56.9 (CH3), 103.5 (CH), 104.2 (C), 108.7 (CH), 109.5 (C), 117.3+121.7+126.0+130.3 (C), 125.8+125.9+125.9+126.0 (CH), 126.3 (CH), 127.9+128.4+128.9+129.4 (C), 131.8 (CH), 141.4 (C), 146.7 (C), 157.2 (C), 158.0 (C), 160.3 (C), 165,0 (C); some peaks are multiplets due to F-coupling. ESI MS/MS [M+H]+ 407, fragment 232. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triethylamine; In dichloromethane; | Example 212 N-Methyl-N-[5-(5,6-dimethoxy-3-methyl-1,4-benzoquinon-2-yl)methyl-2-acetoxybenzoyl]-4-trifluoromethylaniline N-Methyl-4-trifluoromethylaniline (0.200 g, 1.143 mmol), triethylamine (0.116 g, 1.143 mmol) and <strong>[37091-73-9]2-chloro-1,3-dimethylimidazolinium chloride</strong> (0.193 g, 1.143 mmol) were added to a methylene chloride solution (100 ml) of 5-(5,6-dimethoxy-3-methyl-1,4-benzoquinon-2-yl)methyl-2-acetoxybenzoic acid (0.285 g, 0.762 mmol) and the resulting solution was stirred at room temperature for 12 hours. The reaction solution was poured into ice water and then extracted with methylene chloride. The extract was washed with water and then dried, and the solvent was removed by distillation. The obtained residue was purified by preparative thin-layer chromatography (chloroform: methanol = 10:1) to obtain the titled compound (0.140 g, 0.263 mmol, 35percent). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
99% | In octane; for 2.0h;Reflux; Molecular sieve;Product distribution / selectivity; | A mixture of 11 (5.00 g, 18.9 mmol), N-methyl-p-trifluoromethylaniline (5.13 g, 28.4 mmol) and n-octane (200 mL) were refluxed in a Soxhlet extraction apparatus containing 4A molecular sieves (22.9 g) for 2 hours. After cooling the mixture the product was isolated as above to furnish 7.6 g (99 percent) of 4-hydroxy-5-methoxy-N,l-dimethyl-2-oxo-N-[(4- trifluoromethyl)phenyl] - 1 ,2-dihydroquino line-3 -carboxamide (C) . 1 H-NMR analysis on the isolated product revealed no impurities other than 1 molpercent remaining ester 11. 1 H-NMR (CDCI3) 9.9 (s, 1H), 7.50 (bs, 4H), 7.46 (t, 1H), 6.94 (d, 1H), 6.70 (d, 1H), 4.06 (s, 3H), 3.54 (s, 3H), 3.48 (s, 3H). When the same reaction was performed by the traditional distillation from n-octane (Entry 26) during 2 hours according to prior art US patent No. 6,875,869 the product was isolated in 94 percent yield and determined by 1H-NMR analysis to consist of a mixture of compound C (96 molpercent) and the starting material 11 (4 molpercent). |
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