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CAS No. : | 859538-41-3 | MDL No. : | MFCD18256209 |
Formula : | C7H5F2NO2 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | MKLFNFRBDNMKIU-UHFFFAOYSA-N |
M.W : | 173.12 | Pubchem ID : | 23145481 |
Synonyms : |
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Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P264-P271-P280-P302+P352-P304+P340-P305+P351+P338-P312-P362-P403+P233-P501 | UN#: | |
Hazard Statements: | H315-H319-H335 | Packing Group: | |
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 |
---|---|---|
Multi-step reaction with 2 steps 1.1: triethylamine / 1,3-bis-(diphenylphosphino)propane; palladium diacetate / dimethyl sulfoxide / 24 h / 60 °C / 31029.7 Torr 2.1: sodium hydroxide / ethanol / 5 h / 0 - 20 °C 2.2: pH 4 | ||
Multi-step reaction with 2 steps 1.1: triethylamine / 1,3-bis-(diphenylphosphino)propane; palladium diacetate / dimethyl sulfoxide / 24 h / 60 °C / 31029.7 Torr / autoclave 2.1: lithium hydroxide / ethanol / 5 h / 0 - 20 °C 2.2: pH ~ 4 |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
62% | Stage #1: 5-difluoromethyl-pyridine-2-carboxylic acid methyl ester With lithium hydroxide In ethanol at 0 - 20℃; for 5h; Stage #2: With citric acid In water | 108.b A solution of 5-difluoromethyl-pyridine-2-carboxylic acid methyl ester (700 mg, 3.7 mmol) in ethanol (8.0 ml) was treated with a solution of sodium hydroxide (5M, 1.5 ml) at 0 °C. Then the reaction mixture was allowed to attain room temperature and was stirred for 5 hours. For the workup, ethanol was removed at reduced pressure. The resulting solid was dissolved in water (5 ml) and the solution was washed with ethyl acetate (2 x 5 ml). The aqueous layer acidified with a solution of citric acid (10%, pH~4), followed by extraction with a 7:3-mixture of dichloromethane and methanol (5 x 10 ml). The combined organic layers were washed with brine (20 ml), dried over sodium sulphate, and evaporated at reduced pressure. The 5- difluoromethyl-pyridine-2-carboxylic acid was obtained as a white solid (400 mg, 62%> of theory). |
62% | Stage #1: 5-difluoromethyl-pyridine-2-carboxylic acid methyl ester With sodium hydroxide In ethanol at 0 - 20℃; for 5h; Stage #2: With citric acid In water | 108.b b) 5-Difluoromethyl-pyridine-2-carboxylic acidA solution of 5-difluoromethyl-pyridine-2-carboxylic acid methyl ester (700 mg, 3.7 mmol) in ethanol (8.0 ml) was treated with a solution of sodium hydroxide (5M, 1.5 ml) at 0° C. Then the reaction mixture was allowed to attain room temperature and was stirred for 5 hours. For the workup, ethanol was removed at reduced pressure. The resulting solid was dissolved in water (5 ml) and the solution was washed with ethyl acetate (2×5 ml). The aqueous layer acidified with a solution of citric acid (10%, pH4), followed by extraction with a 7:3-mixture of dichloromethane and methanol (5×10 ml). The combined organic layers were washed with brine (20 ml), dried over sodium sulphate, and evaporated at reduced pressure. The 5-difluoromethyl-pyridine-2-carboxylic acid was obtained as a white solid (400 mg, 62% of theory). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 3 steps 1: N,N-dimethyl-formamide; ethyl acetate; n-heptane 2: n-heptane; toluene 3: hydrogenchloride / liquid HCl | ||
Multi-step reaction with 3 steps 1: N,N-dimethyl-formamide / 1.5 h / 120 °C 2: (bis-(2-methoxyethyl)amino)sulfur trufluoride / toluene / 20 °C 3: hydrogenchloride; water / 1.5 h / 110 °C | ||
Multi-step reaction with 3 steps 1: ethyl acetate; N,N-dimethyl-formamide; n-heptane 2: toluene; n-heptane 3: hydrogenchloride / liquid HCl |
Multi-step reaction with 3 steps 1: N,N-dimethyl-formamide / 1.5 h / 120 °C 2: (bis-(2-methoxyethyl)amino)sulfur trufluoride / toluene / 20 °C 3: hydrogenchloride / water / 15 h / 110 °C | ||
Multi-step reaction with 3 steps 1: N,N-dimethyl-formamide / 1.5 h / 120 °C 2: (bis-(2-methoxyethyl)amino)sulfur trufluoride / toluene / 20 °C 3: hydrogenchloride; water / 1.5 h / 110 °C | ||
Multi-step reaction with 3 steps 1: N,N-dimethyl-formamide / 3 h / 120 °C / Inert atmosphere 2: (bis-(2-methoxyethyl)amino)sulfur trufluoride / toluene / 16 h / 25 °C 3: hydrogenchloride; water / 2.5 h / 110 °C | ||
Multi-step reaction with 3 steps 1: N,N-dimethyl-formamide / 1.5 h / 120 °C 2: (bis-(2-methoxyethyl)amino)sulfur trufluoride / toluene / 20 °C 3: hydrogenchloride / water / 1.5 h / 110 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
100% | With hydrogenchloride; water at 110℃; for 1.5h; | 16.3 5-(difluoromethyl)picolinic acid A suspension of 5-(difluoromethyl)picolinonitrile (48 mg, 0.311 mmol) in 12 N aqueous hydrochloric acid (4.3 mL, 140 mmol) was stirred at 110° C. for 1.5 hours. After cooling to ambient temperature, the reaction mixture was concentrated and treated with DIPEA (2 mL). The mixture was concentrated and dried in vacuo to provide the title compound in quantitative yield. LC/MS (ESI+) m/z=174 (M+H) |
100% | With hydrogenchloride; water at 110℃; for 1.5h; | 26.3 5-(difluoromethyl)picolinic acid A suspension of 5-(difluoromethyl)picolinonitrile (48 mg, 0.311 mmol) in 12 N aqueous hydrochloric acid (4.3 mL, 140 mmol) was stirred at 110° C. for 1.5 hours. After cooling to ambient temperature, the reaction mixture was concentrated and treated with DIPEA (2 mL). The mixture was concentrated and dried in vacuo to provide the title compound in quantitative yield. LC/MS (ESI+) m/z=174 (M+H). |
100% | With hydrogenchloride In water at 110℃; for 1.5h; | 3 Step 3: 5-(difluoromethyl)picolinic acid A suspension of 5-(difluoromethyl) picolinonitrile (48 mg, 0.311 mmol) in 12 N aqueous hydrochloric acid (4.3 mL, 140 mmol) was stirred at 110°C for 1.5 h. After cooling to ambient temperature, the reaction mixture was concentrated and treated with DIPEA (2 mL). The mixture was concentrated and dried in vacuo to provide the title compound in quantitative yield. LC/MS (ESI+) m/z = 174 (M+H) +. |
In hydrogenchloride liquid HCl; | 16.3 Step 3: Step 3: 5-(difluoromethyl)picolinic acid A suspension of 5-(difluoromethyl)picolinonitrile (48 mg, 0.311 mmol) in 12 N aqueous hydrochloric acid (4.3 mL, 140 mmol) was stirred at 110° C. for 1.5 hours. After cooling to ambient temperature, the reaction mixture was concentrated and treated with DIPEA (2 mL). The mixture was concentrated and dried in vacuo to provide the title compound in quantitative yield. LC/MS (ESI+) m/z=174 (M+H). | |
In hydrogenchloride liquid HCl; | 240.3 Step 3: Step 3: 5-(difluoromethyl)picolinic acid A suspension of 5-(difluoromethyl)picolinonitrile (48 mg, 0.311 mmol) in 12 N aqueous hydrochloric acid (4.3 mL, 140 mmol) was stirred at 110° C. for 1.5 hours. After cooling to ambient temperature, the reaction mixture was concentrated and treated with DIPEA (2 mL). The mixture was concentrated and dried in vacuo to provide the title compound in quantitative yield. LC/MS (ESI+) m/z=174 (M+H). | |
With hydrogenchloride In water at 110℃; for 15h; | 12.3 5-(difluoromethyl)picolinic acid A suspension of 5-(difluoromethyl) picolinonitrile (48 mg, 0.311 mmol) in 12 N aqueous hydrochloric acid (4.3 mL, 140 mmol) was stirred at 110°C for 1.5 hours. After cooling to ambient temperature, the reaction mixture was concentrated and treated with DIPEA (2 mL). The mixture was concentrated and dried in vacuo to provide the title compound in quantitative yield. LC/MS (ESf ) m/z = 174 (M+H) + | |
With hydrogenchloride; water at 110℃; for 2.5h; | 3 Step 3: (0583) 5-(Difluoromethyl)picolinonitrile (118 mg, 0.75 mmol) in 9 mL of conc. HCl was heated at 110° C. for 2.5 h. The mixture was cooled, concentrated and treated with diisopropylethylamine (2 mL). The mixture was re-concentrated and dried in vacuo to give 5-(difluoromethyl)picolinic acid that was used without purification. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
200 N-(3-((4S,6S)-2-amino-4-methyl-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-4-yl)-4,5-difluorophenyl)-5-(difluoromethyl)picolinamide Example 200 N-(3-((4S,6S)-2-amino-4-methyl-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-4-yl)-4,5-difluorophenyl)-5-(difluoromethyl)picolinamide The title compound was synthesized by procedures and steps analogous to those described in Method Z, Example 186 above, but using 5-(difluoromethyl)picolinic acid (intermediate 12). MS m/z=465.0 [M+H]+. Calculated for C19H15F7N4O2: 464.34 1H NMR (400 MHz, CHLOROFORM-d) δ=9.97 (br. s., 1H), 8.76 (br. s., 1H), 8.38 (d, J=8.2 Hz, 1H), 8.16-8.02 (m, 2H), 7.15 (br. s., 1H), 6.97-6.62 (m, 1H), 4.13-4.00 (m, 1H), 2.80 (d, J=13.7 Hz, 1H), 1.93 (t, J=13.2 Hz, 1H), 1.67 (br. s., 3H) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
221 N-(3-((4S,6S)-2-amino-4-(fluoromethyl)-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-4-yl)-4-fluoro-5-methylphenyl)-5-(difluoromethyl)picolinamide Example 221 N-(3-((4S,6S)-2-amino-4-(fluoromethyl)-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-4-yl)-4-fluoro-5-methylphenyl)-5-(difluoromethyl)picolinamide The title compound was synthesized by procedure and steps analogous to those described in Method A3, Example 216 above, but using 5-(difluoromethyl)picolinic acid (intermediate 12) in step 10. MS m/z=478.9 [M+H]+. Calculated for C20H17F7N4O2: 478.12. 1H NMR (300 MHz, DMSO-d6) δ ppm 1.98 (t, J=12.86 Hz, 1H) 2.26 (d, J=1.90 Hz, 3H) 2.47 (br. s., 1H) 4.28-4.71 (m, 3H) 6.09 (s, 2H) 7.29 (t, J=54.10 Hz, 1H) 7.73 (dd, J=6.65, 2.56 Hz, 1H) 7.82 (dd, J=3.70, 2.80 Hz, 1H) 8.27 (d, J=1.32 Hz, 2H) 8.94 (s, 1H) 10.71 (s, 1H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
41 Synthesis of N-(3-((4S,6S)-2-amino-4-(fluoromethyl)-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-4-yl)-4-fluorophenyl)-5-(difluoromethyl)picolinamide Example 41 Synthesis of N-(3-((4S,6S)-2-amino-4-(fluoromethyl)-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-4-yl)-4-fluorophenyl)-5-(difluoromethyl)picolinamide The title compound was synthesized by procedures and steps analogous to those described in Method F, Example 32 above, but using 5-(difluoromethyl)picolinic acid. MS m/z=464.9 [M+H]+. Calculated for C19H15F7N4O2: 464.11 1H NMR (300 MHz, CHLOROFORM-d) δ ppm 2.29 (t, J=13.30 Hz, 1H) 2.77 (dd, J=13.74, 2.63 Hz, 1H) 4.18-4.32 (m, 1H) 4.41-4.87 (m, 2H) 6.90 (m, J=55.98, 1.00, 1.00 Hz, 1H) 7.16 (dd, J=11.40, 8.92 Hz, 1H) 7.61 (dd, J=6.87, 2.48 Hz, 1H) 8.01-8.15 (m, 2H) 8.39 (d, J=8.04 Hz, 1H) 8.78 (s, 1H) 10.02 (s, 1H). |
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