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CAS No. : | 18063-02-0 | MDL No. : | MFCD00000659 |
Formula : | C7H3ClF2O | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | QRHUZEVERIHEPT-UHFFFAOYSA-N |
M.W : | 176.55 | Pubchem ID : | 87438 |
Synonyms : |
|
Signal Word: | Danger | Class: | 8,3 |
Precautionary Statements: | P280-P305+P351+P338-P310 | UN#: | 2920 |
Hazard Statements: | H225-H314 | Packing Group: | Ⅱ |
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 |
---|---|---|
With triethylamine; In tetrahydrofuran; | EXAMPLE 1 STR6 At 0 to 5 C., 2,6-difluorobenzoyl chloride (1.77 g) was added dropwise to a solution composed of 2-amino-6-trifluoromethylbenzothiazole (2.18 g), tetrahydrofuran (30 ml) and triethylamine (1.1 g). The reaction mixture was stirred at 30 to 40 C. for 5 hours, and then tetrahydrofuran was evaporated. The solid residue was washed with water and recrystallized from ethanol to give the desired N-(6-trifluoromethylbenzothiazol-2-yl)-2,6-difluorobenzamide (2.8 g). mp. 256-257 C. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
83% | In tetrahydrofuran; pyridine; at 20.0℃; for 3.0h; | 2-Amino-5-bromo-4-trifluoromethylthiazole (0.8 g) was dissolved in 3 ml_ of 1 :1 mixture of THF and pyridine. 2,6-difluorobenzoylchloride (0.6 g) was added at room temperature with stirring. The mixture was stirred for 3 hours at room temperature. The mixture was poured into ice water and acidified with aqueous hydrochloric acid then extracted with chloroform. The organic layer was dried over Na2SO4 and the solvent was removed under reduced pressure. Flash chromatography on silica gel gave the title compound as a white solid. Yield 83percent. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
52% | With triethylamine; at 20℃; for 1.5h; | Step C: Methyl 3-[(2,6-difluorophenyl)carbonyl]amino}-4-fluorobenzoate; To a solution of <strong>[369-26-6]methyl 3-amino-4-fluorobenzoate</strong> (5.5 g, 33 mmol) in DCM (100 ml_) was added TEA (6.8 ml_, 49 mmol) and 2,6-difluorobenzoyl chloride (4.3 ml_, 34 mmol). After 90 min at rt, the reaction mixture was washed with H2O and concentrated to a brown oil. The product was purified by column chromatography (eluting with 30-60percent EtOAc /hexanes) to generate the desired product in 52percent yield (5.37 g, 17 mmol). MS (ESI) m/z = 310 [M+Hf . |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
70% | With pyridine; In dichloromethane; at 20℃; | To a (0 C) cooled and stirred solution of 2,6-difluorobenzoyl chloride (357 2.83 mmol) in DCM (5 mL) was added <strong>[156118-16-0]6-bromo-4-methylpyridin-3-amine</strong> (583 mg, 3.12 mmol) followed by the addition of pyridine (344 mu, 4.25 mmol). The resulting mixture was then stirred at room temperature overnight. Water (5 mL) was added to the above mixture and then extracted with DCM (3x10 mL). The combined organic layers were washed with 10% aq.HCl (10 mL), dried (Na2S04) and filtered. The filtrate was concentrated under vacuum to afford 650mg (70%) of the title compound as a white solid. XHNMR (400 MHz, DMSO- d6) delta 10.56 (s, 1H, D20 exchangeable), 8.41 (s, 1H), 7.66 (s, 1H), 7.65-7.58 (m, 1H), 7.27 (t, = 7.0Hz, 2Eta), 2.27 (m, 3H); (ESI-MS (m/z) 327, 329 [(MH)+, Br79' 81]. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
21% | With 3-dimethylaminoacrolein; In pyridine; dichloromethane; at 20℃; for 0.5h; | Part II- Synthesis of 2,6-Difluoro-N-[1,8]naphthyridin-2-ylbenzamide; [1,8]-Naphthyridin-2-ylamine (85 mg, 0.59 mmol) was dissolved in dichloromethane(2 mL) and pyridine (0.10 mL, 1.2 mmol). 2,6-Difluorobenzoyl chloride (0.068 mL, 0.76mmol) was then added and the reaction mixture was stirred at room temperature for 30 minutes. Next, the reaction mixture was diluted with ethyl acetate and washed with water followed bybrine. The resulting organic solution was purified by column chromatography (EtOAc/hexanes) to give 2,6-difluoro-N-[1,8]naphthyridin-2-ylbenzamide. Yield 35 mg (21 %).LCMS (ESI): calc. C1sH9FzN30 = 285; obs. M+H = 286. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
64% | To a suspension of 2-am ino-N-benzyloxy-acetam ide 2,2,2-trifluoroacetic acid(Intermediate Ab, 59 mg, 0.2 mmol) and <strong>[118289-17-1]2-bromopyridine-4-carboxaldehyde</strong> (37 mg, 0.2 mmol)in acetonitrile (1 mL) was added N,N-diisopropylethylamine (33.0 iL, 0.2 mmol). The whitesuspension was heated for 2 h at 50 °G. The mixture was cooled on an ice-water bath to < 5 00 and N,N-diisopropylethylamine (33.0 iL, 0.2 mmcl) was added. Subsequently a solution of 2,6- difluorobenzoyl chloride (30 iL, 0.24 mmol) in acetonitrile (0.1 mL) was added dropwise keeping the temperature below 5 00. The temperature of the reaction mixture was allowed to come to room temperature. The mixture was partially diluted with ethyl acetate (5 mL) and water (3 mL)was added slowly. The resulting phases were separated and the water layer was extracted with ethyl acetate (3 mL). The combined organic layers were washed with water (5 mL), 5percent NaHCO3- solution (5 mL), water (5 mL) and brine (5 mL), filtered over an PE filter filled with Na2504 and concentrated under reduced pressure. The crude residue was purified by column chromatography (heptane to ethyl acetate = 100/0 to 0/100 v/vpercent) to afford the title compound(63 mg, 64percent) as a white solid. |
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