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CAS No. : | 887266-90-2 | MDL No. : | MFCD07368699 |
Formula : | C7H3BrClFO | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | RGMMCYNLNAUIJX-UHFFFAOYSA-N |
M.W : | 237.45 g/mol | Pubchem ID : | 2783345 |
Synonyms : |
|
Num. heavy atoms : | 11 |
Num. arom. heavy atoms : | 6 |
Fraction Csp3 : | 0.0 |
Num. rotatable bonds : | 1 |
Num. H-bond acceptors : | 2.0 |
Num. H-bond donors : | 0.0 |
Molar Refractivity : | 44.28 |
TPSA : | 17.07 Ų |
GI absorption : | High |
BBB permeant : | Yes |
P-gp substrate : | No |
CYP1A2 inhibitor : | Yes |
CYP2C19 inhibitor : | No |
CYP2C9 inhibitor : | No |
CYP2D6 inhibitor : | No |
CYP3A4 inhibitor : | No |
Log Kp (skin permeation) : | -5.46 cm/s |
Log Po/w (iLOGP) : | 2.11 |
Log Po/w (XLOGP3) : | 3.22 |
Log Po/w (WLOGP) : | 3.39 |
Log Po/w (MLOGP) : | 3.2 |
Log Po/w (SILICOS-IT) : | 3.44 |
Consensus Log Po/w : | 3.07 |
Lipinski : | 0.0 |
Ghose : | None |
Veber : | 0.0 |
Egan : | 0.0 |
Muegge : | 1.0 |
Bioavailability Score : | 0.55 |
Log S (ESOL) : | -3.68 |
Solubility : | 0.0498 mg/ml ; 0.00021 mol/l |
Class : | Soluble |
Log S (Ali) : | -3.25 |
Solubility : | 0.133 mg/ml ; 0.000561 mol/l |
Class : | Soluble |
Log S (SILICOS-IT) : | -4.1 |
Solubility : | 0.0189 mg/ml ; 0.0000794 mol/l |
Class : | Moderately soluble |
PAINS : | 0.0 alert |
Brenk : | 1.0 alert |
Leadlikeness : | 1.0 |
Synthetic accessibility : | 1.6 |
Signal Word: | Danger | Class: | 8 |
Precautionary Statements: | P260-P271-P280-P260-P271-P280 | UN#: | 3265 |
Hazard Statements: | H314-H302+H312+H332 | Packing Group: | Ⅲ |
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 |
---|---|---|
1.8 g | at 0 - 20℃; for 2.08333 h; | A mixture of 3-bromo-5-fluorobenzoic acid (2.8 g, 13.0 mmol) and thionyl chloride (10 mL) was heated to 70 °C for 2 h, after cooling to room temperature excess thionyl chloride was evaporated. To the residue at 0 °C was methanol (50 mL) and triethylamine (4.5 mL) added, the reaction was stirred at 0°C for 5 minutes and then at room temperature for 2 h. The mixture was concentrated, diluted with ethyl acetate (100 mL) and washed consecutively with: 1) hydrochloric acid (5percent, 50 mL), 2) saturated sodium bicarbonate (50 mL), the organic phase was dried over magnesium sulfate and evaporated. Purification by flash chromatography using heptane:ethyl acetate 9:1 as the eluent gave the title compound (1.8 g, 60percent). H NMR (400 MHz, CDCl3) d ppm 3.89 (s, 3 H), 7.38 (dtd, 1 H), 7.58 - 7.63 (m, 1 H), 7.90 - 7.93 (m, 1 H); 13C NMR (101 MHz, CDCl3) d 52.9, 115.6, 115.8, 122.8, 122.9, 123.5, 123.7, 128.8, 128.8, 133.6, 133.6, 161.2, 163.7, 164.8, 164.8. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In hexane; dichloromethane; ethyl acetate; N,N-dimethyl-formamide; | 3-(5-Cyano-2-pyridyl)-5-(3-bromo-5-fluorophenyl)-1,2,4-oxadiazol Using the general procedure for the preparation of acid chlorides, <strong>[887266-90-2]3-bromo-5-fluorobenzoyl chloride</strong> was prepared from 3-bromo-5-fluorobenzoic acid chloride (554 mg, 2.52 mmol). The acid chloride in dichloromethane (10 mL) was treated with 5-tert-butoxycarbonylpyrid-2-ylamidoxime (601 mg, 2.53 mmol). The mixture was stirred at room temperature for 30 minutes and the solvent was removed in vacuo. The intermediate was dissolved in DMF (15 mL) and heated in sealed tube at 120 C. for 13 hours. After cooling the solvent was removed in vacuo. Silica gel chromatography using a gradient of 5% to 10% ethyl acetate in hexane, afforded 556 mg of crude 3-(5-tert-butoxycarbonyl-2-pyridyl)-5-(3-bromo-5-fluorophenyl)-1,2,4-oxadiazole. A mixture of this crude intermediate in formic acid (98%, 20 mL) was heated at 40 C. for 17 hours. Evaporation of the solvent in vacuo afforded 3-(5-hydroxycarbonylpyrid-2-yl)-5-(3-bromo-5-fluorophenyl)-1,2,4-oxadiazole as a white solid. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
97.1% | With thionyl chloride; at 80℃; for 3h; | 10287] Compound 1 (16 g, 73.4 mmol) was dissolved in50C12 (160 mE) and heated to 80 C. for 3 hour. The mixturewas concentrated in vacuo to give compound 2 as brown oil(16.8 g, 97.1%). |
With thionyl chloride;N,N-dimethyl-formamide; In dichlorodimethane; at 0 - 5℃; for 1h;Heating / reflux; | Prepared as described in the general procedure A using 3-bromo, 5-fluoro benzoic acid (4.00 g, 17.5 mmol).Yield g, %, mp 0C; 1HNMR (400 MHz, CDCl3) delta 2.58 (s, 3H), 7.02-7.04 (d, J = 8.0 Hz, IH), 7.45-7.48 (m, IH), 7.73-7.80 (m, 2H), 8.08-8.11 (dt, J = 1.2, 11.2 Hz, IH), 8.31- 8.33 (d, J = 8.0 Hz, IH); 13CNMR (101 MHz, CDCl3) delta 2; IR (Neat, cm"1); GC-MS (EI) m/z 309 (M+); Anal. (C20H18N2O2.HBr.H2O) C, H, N. | |
With thionyl chloride; for 2h;Reflux; | General procedure: 3,5-dibromobenzoic acid (5g, 17.8 mmol) was suspended in 25 mL of thionyl chloride, an refluxed for 2h. After cooling to room temperature the excess thionyl chloride was removed under reduce pressure and the residue was cautiously poured into 100 mL of ice cold NH4OH 28%, and stirred at room temperature for 3h. Filtration of the precipitate provide after drying in vacuum the amide intermediate in quantitative yield. The amide was suspended in 25 mL of thionyl chloride, and refluxed for 18h before removing the excess thionyl chloride under reduce pressure. The residue was dissolved in 50 mL of AcOEt, and washed with a saturated solution of NaHCO3 (3 X 50 mL), dry over Na2SO4, and concentrated on a rotary evaporator. Purification of the residue by column chromatography yielded 2.71g (58 %) 9a as a yellow solid.1H NMR (CDCl3), d = 8.07 (t, 1H, J=2.0 Hz, CHAr); 8.40 (t, 1H, J=2.0 Hz, CHAr); 8.52 (t, 1H, J=2.0 Hz, CHAr). 13C NMR (CDCl3), d = 115.7 (1C, Cq); 115.8 (1C, Cq); 124.3 (1C, Cq); 126.2 (1C, CHAr); 131.3 (1C, CHAr); 140.7 (1C, Cq). |
With thionyl chloride; for 2h;Reflux; | A solution of <strong>[176548-70-2]3-bromo-5-fluorobenzoic acid</strong> (commercially available) (10.0 g, 45.7 mmol) in thionyl chloride (80 mL) was heated at reflux for 2 hours. Thionyl chloride was removed under reduced pressure and the residue was added to solution of N,O-dimethylhydroxylamine hydrochloride (5.32 g, 54.8 mmol) and Et3N (10.1 g, 0.1 mol) in DCM (300 mL) dropwise at 0 C. After the reaction mixture was stirred at r.t. overnight, it was washed with water (3*100 mL), brine, dried over anhydrous Na2SO4 and concentrated. The colorless oil was used in next step without further purification (11.0 g, yield: 95%). | |
With oxalyl dichloride; N,N-dimethyl-formamide; In dichloromethane; at 20℃; for 1.66667h; | Synthesis of 3-Bromo-5-fl uoro-benzoyl chloride lOg of <strong>[176548-70-2]3-bromo-5-fluoro-benzoic acid</strong> are suspended in 1 OOml of DCM, O,5m1 DMF and 4.5m1 oxalyl chloride (1,15 Eq) are added and the resulting mixture is stirred for 100 minutes at RT. The solvent is removed by vacuo and the benzoic acid chloride isisolated by distillation. | |
With oxalyl dichloride; In dichloromethane; N,N-dimethyl-formamide; at 20℃; for 1.66667h; | 10 g of <strong>[176548-70-2]3-bromo-5-fluoro-benzoic acid</strong> are suspended in 100 ml of DCM, 0.5 ml DMF and 4.5 ml oxalyl chloride (1.15 Eq) are added and the resulting mixture is stirred for 100 minutes at RT. The solvent is removed by vacuo and the benzoic acid chloride is isolated by distillation. | |
With oxalyl dichloride; N,N-dimethyl-formamide; In dichloromethane; at 20℃; for 1.66667h; | 10g of <strong>[176548-70-2]3-bromo-5-fluoro-benzoic acid</strong> are suspended in 100ml of DCM, 0,5ml DMF and 4.5ml oxalyl chloride (1 ,15 Eq) are added and the resulting mixture is stirred for 100 minutes at RT. The solvent is removed by vacuo and the benzoic acid chloride is isolated by distillation. | |
With oxalyl dichloride; In dichloromethane; N,N-dimethyl-formamide; at 20℃; for 1.66667h; | 10 g of <strong>[176548-70-2]3-bromo-5-fluoro-benzoic acid</strong> are suspended in 100 ml of DCM, 0.5 ml DMF and 4.5 ml oxalyl chloride (1.15 Eq) are added and the resulting mixture is stirred for 100 minutes at RT. The solvent is removed by vacuo and the benzoic acid chloride is isolated by distillation. | |
With oxalyl dichloride; N,N-dimethyl-formamide; In tetrahydrofuran; dichloromethane; at 20℃; for 1.5h; | <strong>[176548-70-2]3-bromo-5-fluorobenzoic acid</strong> (32.0 g, 1 .0 equiv) was stirred in a mixture of DCM (288 mL, 9 vol) and THF (32 mL, 1 vol) until the majority of the solid dissolved. DMF (0.57 mL, 5 mol%) was added, and the flask placed in an ambient temperature water bath. Oxalyl chloride (13.7 mL, 1.10 equiv) was added over 1 h via syringe pump; 30 minute after the end of addition the reaction was complete by HPLC (sample quenched into MeOH to form methyl ester prior to analysis). The resulting thin slurry was aged overnight, concentrated to 100 mL volume, diluted with THF (160 mL, 5 vol) and again concentrated to 100 mL. The resulting thin slurry of acid chloride was diluted to 160 mL total volume with THF. A solution of LiOtBu in THF (20 wt%, 67.3 g, 77 mL, 1.15 equiv) was diluted with THF (243 mL), then this solution was cooled to an internal temperature of - 9 C with an ice/salt bath. To this was added the slurry containing acid chloride over 55 mm, while the internal temperature remained below -3 C . The reaction was complete 15 mm following the end of addition. The solution was aged overnight as it warmed to ambient temperature, diluted with heptane (320 mL, 10 vol), and washed with water (160 mL, 5 vol). The aqueous layer was removed to the insoluble rag at the interlace, then the organic layer was filtered through a pad of solka-floc. The pad was rinsed with heptane (10 mL), then the combined organic layer was washed 2xwith water (2 x 80 mL, 2.5 vol). The resulting organic layer was distilled under reduced pressure to a 100 mL final volume, diluted with heptane (160 mL, 5 vol), and concentrated again to 100 mLtotal volume. The solution of tert-butyl 3-bromo-5-fluorobenzoate was used directly in the next step.NMR 1H (400MHz; CDCI3): 7.89-7.88 (1H, m), 7.60-7.57 (1H, m), 7.40-7.37 (1H, m), 1.57 (9H, 5). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With pyridine; In dichlorodimethane; at 0 - 5℃; | Prepared as described in the general procedure A using 3-bromo, 5-fluoro benzoic acid (4.00 g, 17.5 mmol).Yield g, %, mp 0C; 1HNMR (400 MHz, CDCl3) δ 2.58 (s, 3H), 7.02-7.04 (d, J = 8.0 Hz, IH), 7.45-7.48 (m, IH), 7.73-7.80 (m, 2H), 8.08-8.11 (dt, J = 1.2, 11.2 Hz, IH), 8.31- 8.33 (d, J = 8.0 Hz, IH); 13CNMR (101 MHz, CDCl3) δ 2; IR (Neat, cm"1); GC-MS (EI) m/z 309 (M+); Anal. (C20H18N2O2.HBr.H2O) C, H, N. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With ammonium hydroxide; at 20℃;Cooling with ice; | General procedure: 3,5-dibromobenzoic acid (5g, 17.8 mmol) was suspended in 25 mL of thionyl chloride, an refluxed for 2h. After cooling to room temperature the excess thionyl chloride was removed under reduce pressure and the residue was cautiously poured into 100 mL of ice cold NH4OH 28%, and stirred at room temperature for 3h. Filtration of the precipitate provide after drying in vacuum the amide intermediate in quantitative yield. The amide was suspended in 25 mL of thionyl chloride, and refluxed for 18h before removing the excess thionyl chloride under reduce pressure. The residue was dissolved in 50 mL of AcOEt, and washed with a saturated solution of NaHCO3 (3 X 50 mL), dry over Na2SO4, and concentrated on a rotary evaporator. Purification of the residue by column chromatography yielded 2.71g (58 %) 9a as a yellow solid.1H NMR (CDCl3), d = 8.07 (t, 1H, J=2.0 Hz, CHAr); 8.40 (t, 1H, J=2.0 Hz, CHAr); 8.52 (t, 1H, J=2.0 Hz, CHAr). 13C NMR (CDCl3), d = 115.7 (1C, Cq); 115.8 (1C, Cq); 124.3 (1C, Cq); 126.2 (1C, CHAr); 131.3 (1C, CHAr); 140.7 (1C, Cq). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
1.8 g | With triethylamine; at 0 - 20℃; for 2.08333h; | A mixture of 3-bromo-5-fluorobenzoic acid (2.8 g, 13.0 mmol) and thionyl chloride (10 mL) was heated to 70 C for 2 h, after cooling to room temperature excess thionyl chloride was evaporated. To the residue at 0 C was methanol (50 mL) and triethylamine (4.5 mL) added, the reaction was stirred at 0C for 5 minutes and then at room temperature for 2 h. The mixture was concentrated, diluted with ethyl acetate (100 mL) and washed consecutively with: 1) hydrochloric acid (5%, 50 mL), 2) saturated sodium bicarbonate (50 mL), the organic phase was dried over magnesium sulfate and evaporated. Purification by flash chromatography using heptane:ethyl acetate 9:1 as the eluent gave the title compound (1.8 g, 60%). H NMR (400 MHz, CDCl3) d ppm 3.89 (s, 3 H), 7.38 (dtd, 1 H), 7.58 - 7.63 (m, 1 H), 7.90 - 7.93 (m, 1 H); 13C NMR (101 MHz, CDCl3) d 52.9, 115.6, 115.8, 122.8, 122.9, 123.5, 123.7, 128.8, 128.8, 133.6, 133.6, 161.2, 163.7, 164.8, 164.8. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
11.0 g | With triethylamine; In dichloromethane; at 0 - 20℃; | A solution of 3-bromo-5-fluorobenzoic acid (commercially available) (10.0 g, 45.7 mmol) in thionyl chloride (80 mL) was heated at reflux for 2 hours. Thionyl chloride was removed under reduced pressure and the residue was added to solution of N,O-dimethylhydroxylamine hydrochloride (5.32 g, 54.8 mmol) and Et3N (10.1 g, 0.1 mol) in DCM (300 mL) dropwise at 0 C. After the reaction mixture was stirred at r.t. overnight, it was washed with water (3*100 mL), brine, dried over anhydrous Na2SO4 and concentrated. The colorless oil was used in next step without further purification (11.0 g, yield: 95%). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Synthesis of (3-Bromo-5-fluoro-phenyl)-oxazol-2-yl-methanone To a stirring mixture of 1 ,3-oxazole (3,46 g, 5Ommol) in dry THE (5OmL) was addedn-BuLi (1,1 Eq, 20,01 ml solution in hexanes) drop wise over 10 minutes at -78Cunder nitrogen atmosphere. After stirring for 30 minutes at -78C zinc chloride (0,1 mmol, 2,2Eq) as a 2M solution in 5-methyl-tetrahydrofurane was added within 30 minutes and the mixture was allowed to reach -20C during the addition. Then the mixture was stirred at 0C for 40 minutes, Cul (8,66g, 45,Smmol) was added andstirring continued for additional 10 minutes. 3-Bromo-5-fluoro-benzoyl chloride (45,Smmol, 8,66g) was dissolved in 50m1 of THE and added to the metallated 1,3- oxazole. Stirring was continued until complete conversion was observed by LCMS and 50m1 water and 50 ml of a 0,5 M citric acid solution were added. The solid material from the reaction mixture was filtered off and washed with 5-methyl-thf. Theorganic phase was separated, washed with brine and dried over Mg504. 10,8g of crude material (yield = 88%) were obtained and used directly in the next step. | ||
To a stirring mixture of 1,3-oxazole (3.46 g, 50 mmol) in dry THF (50 mL) was added n-BuLi (1.1 Eq, 20.01 ml solution in hexanes) drop wise over 10 minutes at -78 C. under nitrogen atmosphere. After stirring for 30 minutes at -78 C. zinc chloride (0.1 mmol, 2.2Eq) as a 2M solution in 5-methyl-tetrahydrofurane was added within 30 minutes and the mixture was allowed to reach -20 C. during the addition. Then the mixture was stirred at 0 C. for 40 minutes, CuI (8.66 g, 45.5 mmol) was added and stirring continued for additional 10 minutes. 3-Bromo-5-fluoro-benzoyl chloride (45.5 mmol, 8.66 g) was dissolved in 50 ml of THF and added to the metallated 1,3-oxazole. Stirring was continued until complete conversion was observed by LCMS and 50 ml water and 50 ml of a 0.5 M citric acid solution were added. The solid material from the reaction mixture was filtered off and washed with 5-methyl-thf. The organic phase was separated, washed with brine and dried over MgSO4. 10.8 g of crude material (yield=88%) were obtained and used directly in the next step. The mixture was stirred between -78 C. and -60 C. for 30 minutes and then cooled to -78 C. A solution of 3-Bromo-5-chloro-benzoic acid methyl ester (11.0 g, 44.1 mmol) in THF (20 mL) was added drop wise over 10 minutes. The resulting mixture was stirred at -78 C. for 30 minutes and warmed to room temperature with stirring overnight. The mixture was cooled to 0 C. and treated with water (50 mL). The resulting mixture was adjusted to pH around 6 with HCl (1N) and extracted with EtOAc (100 mL*3). The combined organic layers were dried over Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography eluting with petroleum ether/EtOAc mixtures to afford (3-Bromo-5-chloro-phenyl)-(5-methyl-thiazol-2-yl)-methanone (14 g, yield=100%) as a solid. | ||
To a stirring mixture of 1 ,3-oxazole (3,46 g, 50mmol) in dry THF (50ml_) was added n-BuLi (1 ,1 Eq, 20,01 ml solution in hexanes) drop wise over 10 minutes at -78 C under nitrogen atmosphere. After stirring for 30 minutes at -78C zinc chloride (0,1 mmol, 2,2Eq) as a 2M solution in 5-methyl-tetrahydrofurane was added within 30 minutes and the mixture was allowed to reach -20C during the addition. Then the mixture was stirred at 0C for 40 minutes, Cul (8,66g, 45,5mmol) was added and stirring continued for additional 10 minutes. 3-Bromo-5-fluoro-benzoyl chloride (45,5mmol, 8,66g) was dissolved in 50ml of THF and added to the metallated 1 ,3- oxazole. Stirring was continued until complete conversion was observed by LCMS and 50ml water and 50 ml of a 0,5 M citric acid solution were added. The solid material from the reaction mixture was filtered off and washed with 5-methyl-thf. The organic phase was separated, washed with brine and dried over MgSO4. 10, 8g of crude material (yield = 88%) were obtained and used directly in the next step. |
To a stirring mixture of 1,3-oxazole (3.46 g, 50 mmol) in dry THF (50 mL) was added n-BuLi (1.1 Eq, 20.01 ml solution in hexanes) drop wise over 10 minutes at -78 C. under nitrogen atmosphere. After stirring for 30 minutes at -78 C. zinc chloride (0.1 mmol, 2.2Eq) as a 2M solution in 5-methyl-tetrahydrofurane was added within 30 minutes and the mixture was allowed to reach -20 C. during the addition. Then the mixture was stirred at 0 C. for 40 minutes, CuI (8.66 g, 45.5 mmol) was added and stirring continued for additional 10 minutes. 3-Bromo-5-fluoro-benzoyl chloride (45.5 mmol, 8.66 g) was dissolved in 50 ml of THF and added to the metallated 1,3-oxazole. Stirring was continued until complete conversion was observed by LCMS and 50 ml water and 50 ml of a 0.5 M citric acid solution were added. The solid material from the reaction mixture was filtered off and washed with 5-methyl-thf. The organic phase was separated, washed with brine and dried over MgSO4. 10.8 g of crude material (yield=88%) were obtained and used directly in the next step. The mixture was stirred between -78 C. and -60 C. for 30 minutes and then cooled to -78 C. A solution of 3-Bromo-5-chloro-benzoic acid methyl ester (11.0 g, 44.1 mmol) in THF (20 mL) was added drop wise over 10 minutes. The resulting mixture was stirred at -78 C. for 30 minutes and warmed to room temperature with stirring overnight. The mixture was cooled to 0 C. and treated with water (50 mL). The resulting mixture was adjusted to pH around 6 with HCl (1N) and extracted with EtOAc (100 mL*3). The combined organic layers were dried over Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography eluting with petroleum ether/EtOAc mixtures to afford (3-Bromo-5-chloro-phenyl)-(5-methyl-thiazol-2-yl)-methanone (14 g, yield=100%) as a solid. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triethylamine; In acetonitrile; at 16℃; for 2h; | 10289] To a solution of compound 3 (5.2 g, 35.7 mmol) inMeCN (130 mE) added TEA (7.2 g, 171.4 mmol) followed bycompound 2 (8.4 g, 35.7 mmol). The mixture was stirred at16 C. for 2 hour. Filtrated, the white solid was collected togive the desired product. ECMS: 348/350 [M+1]. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In tetrahydrofuran; | 3-bromo-5-fluorobenzoic acid (32.0 g, 1 .0 equiv) was stirred in a mixture of DCM (288 mL, 9 vol) and THF (32 mL, 1 vol) until the majority of the solid dissolved. DMF (0.57 mL, 5 mol%) was added, and the flask placed in an ambient temperature water bath. Oxalyl chloride (13.7 mL, 1.10 equiv) was added over 1 h via syringe pump; 30 minute after the end of addition the reaction was complete by HPLC (sample quenched into MeOH to form methyl ester prior to analysis). The resulting thin slurry was aged overnight, concentrated to 100 mL volume, diluted with THF (160 mL, 5 vol) and again concentrated to 100 mL. The resulting thin slurry of acid chloride was diluted to 160 mL total volume with THF. A solution of LiOtBu in THF (20 wt%, 67.3 g, 77 mL, 1.15 equiv) was diluted with THF (243 mL), then this solution was cooled to an internal temperature of - 9 C with an ice/salt bath. To this was added the slurry containing acid chloride over 55 mm, while the internal temperature remained below -3 C . The reaction was complete 15 mm following the end of addition. The solution was aged overnight as it warmed to ambient temperature, diluted with heptane (320 mL, 10 vol), and washed with water (160 mL, 5 vol). The aqueous layer was removed to the insoluble rag at the interlace, then the organic layer was filtered through a pad of solka-floc. The pad was rinsed with heptane (10 mL), then the combined organic layer was washed 2xwith water (2 x 80 mL, 2.5 vol). The resulting organic layer was distilled under reduced pressure to a 100 mL final volume, diluted with heptane (160 mL, 5 vol), and concentrated again to 100 mLtotal volume. The solution of tert-butyl 3-bromo-5-fluorobenzoate was used directly in the next step.NMR 1H (400MHz; CDCI3): 7.89-7.88 (1H, m), 7.60-7.57 (1H, m), 7.40-7.37 (1H, m), 1.57 (9H, 5). | |
In tetrahydrofuran; at -9 - -3℃; | 3-bromo-5-fluorobenzoic acid (32.0 g, 1.0 equiv) was stirredin a mixture of DCM (288 mL, 9 vol) and THF (32 mL, 1 vol) until the majority of the solid dissolved. DMF (0.57 mL, 5 mol%) was added, and the flask placedin an ambient temperature water bath. Oxalyl chloride (13.7 mL, 1.10 equiv) was added over 1H via syringe pump; 30 minute after the end of addition the reaction was complete by HPLC (sample quenchedinto MeOH to form methyl ester prior to analysis). The resulting thin slurry was aged overnight, concentrated to 100 mL volume, diluted with THF (160 mL, 5 vol) and again concentrated to 100 mL. The resulting thin slurry of acid chloride was diluted to 160 mL total volume with THF. A solution of LiOtBu in THF (20 wt%, 67.3 g, 77 mL, 1 .15 equiv) was diluted with THF (243 mL), then this solution was cooled to an internal temperature of - 9 C with an ice/salt bath. To this was added the slurry containing acid chloride over 55 min, while the internal temperature remained below -3 C . The reaction was complete 15 min following the end of addition. The solution was aged overnight as it warmed to ambient temperature, diluted with heptane (320 mL, 10 vol), and washed with water (160 mL, 5 vol). The aqueous layer was removed to the insoluble rag at the interface, then the organic layer was filtered through a pad of solka-floc. The pad was rinsed with heptane (10 mL), then the combined organic layer was washed 2x with water (2 x 80 mL, 2.5 vol). The resulting organic layer was distilled under reduced pressure to a 100 mL final volume, diluted with heptane (160 mL, 5 vol), and concentrated again to 100 mL total volume. The solution of tert-butyl 3-bromo-5-fluorobenzoate was used directly in the next step. NMR 1H (400MHz; CDCI3): 7.89-7.88 (1H, m), 7.60-7.57 (1H, m), 7.40-7.37 (1H, m), 1 .57 (9H, s). | |
With oxalyl dichloride; N,N-dimethyl-formamide; In tetrahydrofuran; at -9 - -3℃; for 1.16667h; | 3-bromo-5-fluorobenzoic acid (32.0 g, 1.0 equiv) was stirred in a mixture of DCM (288 mL, 9 vol) and THF (32 mL, 1 vol) until the majority of the solid dissolved. DMF (0.57 mL, 5 mol%) was added, and the flask placed in an ambient temperature water bath. Oxalyl chloride (13.7 mL, 1.10 equiv) was added over 1 h via syringe pump; 30 minute after the end of addition the reaction was complete by HPLC (sample quenched into MeOH to form methyl ester prior to analysis). The resulting thin slurry was aged overnight, concentrated to 100 mL volume, diluted with THF (160 mL, 5 vol) and again concentrated to 100 mL. The resulting thin slurry of acid chloride was diluted to 160 mL total volume with THF. A solution of LiOtBu in THF (20 wt%, 67.3 g, 77 mL, 1.15 equiv) was diluted with THF (243 mL), then this solution was cooled to an internal temperature of - 9 C with an ice/salt bath. To this was added the slurry containing acid chloride over 55 min, while the internal temperature remained below -3 C . The reaction was complete 15 min following the end of addition. The solution was aged overnight as it warmed to ambient temperature, diluted with heptane (320 mL, 10 vol), and washed with water (160 mL, 5 vol). The aqueous layer was removed to the insoluble rag at the interface, then the organic layer was filtered through a pad of solka-floc. The pad was rinsed with heptane (10 mL), then the combined organic layer was washed 2x with water (2 x 80 mL, 2.5 vol). The resulting organic layer was distilled under reduced pressure to a 100 mL final volume, diluted with heptane (160 mL, 5 vol), and concentrated again to 100 mL total volume. The solution of tert-butyl 3-bromo-5-fluorobenzoate was used directly in the next step. NMR 1H (400MHz; CDCl3): 7.89-7.88 (1H, m), 7.60-7.57 (1H, m), 7.40-7.37 (1H, m), 1.57 (9H, s). |
Tags: 887266-90-2 synthesis path| 887266-90-2 SDS| 887266-90-2 COA| 887266-90-2 purity| 887266-90-2 application| 887266-90-2 NMR| 887266-90-2 COA| 887266-90-2 structure
Precautionary Statements-General | |
Code | Phrase |
P101 | If medical advice is needed,have product container or label at hand. |
P102 | Keep out of reach of children. |
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Prevention | |
Code | Phrase |
P201 | Obtain special instructions before use. |
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P210 | Keep away from heat/sparks/open flames/hot surfaces. - No smoking. |
P211 | Do not spray on an open flame or other ignition source. |
P220 | Keep/Store away from clothing/combustible materials. |
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P222 | Do not allow contact with air. |
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P240 | Ground/bond container and receiving equipment. |
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P261 | Avoid breathing dust/fume/gas/mist/vapours/spray. |
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P263 | Avoid contact during pregnancy/while nursing. |
P264 | Wash hands thoroughly after handling. |
P265 | Wash skin thouroughly after handling. |
P270 | Do not eat, drink or smoke when using this product. |
P271 | Use only outdoors or in a well-ventilated area. |
P272 | Contaminated work clothing should not be allowed out of the workplace. |
P273 | Avoid release to the environment. |
P280 | Wear protective gloves/protective clothing/eye protection/face protection. |
P281 | Use personal protective equipment as required. |
P282 | Wear cold insulating gloves/face shield/eye protection. |
P283 | Wear fire/flame resistant/retardant clothing. |
P284 | Wear respiratory protection. |
P285 | In case of inadequate ventilation wear respiratory protection. |
P231 + P232 | Handle under inert gas. Protect from moisture. |
P235 + P410 | Keep cool. Protect from sunlight. |
Response | |
Code | Phrase |
P301 | IF SWALLOWED: |
P304 | IF INHALED: |
P305 | IF IN EYES: |
P306 | IF ON CLOTHING: |
P307 | IF exposed: |
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P313 | Get medical advice/attention. |
P314 | Get medical advice/attention if you feel unwell. |
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P320 | |
P302 + P352 | IF ON SKIN: wash with plenty of soap and water. |
P321 | |
P322 | |
P330 | Rinse mouth. |
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P332 | IF SKIN irritation occurs: |
P333 | If skin irritation or rash occurs: |
P334 | Immerse in cool water/wrap n wet bandages. |
P335 | Brush off loose particles from skin. |
P336 | Thaw frosted parts with lukewarm water. Do not rub affected area. |
P337 | If eye irritation persists: |
P338 | Remove contact lenses, if present and easy to do. Continue rinsing. |
P340 | Remove victim to fresh air and keep at rest in a position comfortable for breathing. |
P341 | If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing. |
P342 | If experiencing respiratory symptoms: |
P350 | Gently wash with plenty of soap and water. |
P351 | Rinse cautiously with water for several minutes. |
P352 | Wash with plenty of soap and water. |
P353 | Rinse skin with water/shower. |
P360 | Rinse immediately contaminated clothing and skin with plenty of water before removing clothes. |
P361 | Remove/Take off immediately all contaminated clothing. |
P362 | Take off contaminated clothing and wash before reuse. |
P363 | Wash contaminated clothing before reuse. |
P370 | In case of fire: |
P371 | In case of major fire and large quantities: |
P372 | Explosion risk in case of fire. |
P373 | DO NOT fight fire when fire reaches explosives. |
P374 | Fight fire with normal precautions from a reasonable distance. |
P376 | Stop leak if safe to do so. Oxidising gases (section 2.4) 1 |
P377 | Leaking gas fire: Do not extinguish, unless leak can be stopped safely. |
P378 | |
P380 | Evacuate area. |
P381 | Eliminate all ignition sources if safe to do so. |
P390 | Absorb spillage to prevent material damage. |
P391 | Collect spillage. Hazardous to the aquatic environment |
P301 + P310 | IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. |
P301 + P312 | IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. |
P301 + P330 + P331 | IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. |
P302 + P334 | IF ON SKIN: Immerse in cool water/wrap in wet bandages. |
P302 + P350 | IF ON SKIN: Gently wash with plenty of soap and water. |
P303 + P361 + P353 | IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. |
P304 + P312 | IF INHALED: Call a POISON CENTER or doctor/physician if you feel unwell. |
P304 + P340 | IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. |
P304 + P341 | IF INHALED: If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing. |
P305 + P351 + P338 | IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. |
P306 + P360 | IF ON CLOTHING: Rinse Immediately contaminated CLOTHING and SKIN with plenty of water before removing clothes. |
P307 + P311 | IF exposed: call a POISON CENTER or doctor/physician. |
P308 + P313 | IF exposed or concerned: Get medical advice/attention. |
P309 + P311 | IF exposed or if you feel unwell: call a POISON CENTER or doctor/physician. |
P332 + P313 | IF SKIN irritation occurs: Get medical advice/attention. |
P333 + P313 | IF SKIN irritation or rash occurs: Get medical advice/attention. |
P335 + P334 | Brush off loose particles from skin. Immerse in cool water/wrap in wet bandages. |
P337 + P313 | IF eye irritation persists: Get medical advice/attention. |
P342 + P311 | IF experiencing respiratory symptoms: call a POISON CENTER or doctor/physician. |
P370 + P376 | In case of fire: Stop leak if safe to Do so. |
P370 + P378 | In case of fire: |
P370 + P380 | In case of fire: Evacuate area. |
P370 + P380 + P375 | In case of fire: Evacuate area. Fight fire remotely due to the risk of explosion. |
P371 + P380 + P375 | In case of major fire and large quantities: Evacuate area. Fight fire remotely due to the risk of explosion. |
Storage | |
Code | Phrase |
P401 | |
P402 | Store in a dry place. |
P403 | Store in a well-ventilated place. |
P404 | Store in a closed container. |
P405 | Store locked up. |
P406 | Store in corrosive resistant/ container with a resistant inner liner. |
P407 | Maintain air gap between stacks/pallets. |
P410 | Protect from sunlight. |
P411 | |
P412 | Do not expose to temperatures exceeding 50 oC/ 122 oF. |
P413 | |
P420 | Store away from other materials. |
P422 | |
P402 + P404 | Store in a dry place. Store in a closed container. |
P403 + P233 | Store in a well-ventilated place. Keep container tightly closed. |
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P410 + P403 | Protect from sunlight. Store in a well-ventilated place. |
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P411 + P235 | Keep cool. |
Disposal | |
Code | Phrase |
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P502 | Refer to manufacturer/supplier for information on recovery/recycling |
Physical hazards | |
Code | Phrase |
H200 | Unstable explosive |
H201 | Explosive; mass explosion hazard |
H202 | Explosive; severe projection hazard |
H203 | Explosive; fire, blast or projection hazard |
H204 | Fire or projection hazard |
H205 | May mass explode in fire |
H220 | Extremely flammable gas |
H221 | Flammable gas |
H222 | Extremely flammable aerosol |
H223 | Flammable aerosol |
H224 | Extremely flammable liquid and vapour |
H225 | Highly flammable liquid and vapour |
H226 | Flammable liquid and vapour |
H227 | Combustible liquid |
H228 | Flammable solid |
H229 | Pressurized container: may burst if heated |
H230 | May react explosively even in the absence of air |
H231 | May react explosively even in the absence of air at elevated pressure and/or temperature |
H240 | Heating may cause an explosion |
H241 | Heating may cause a fire or explosion |
H242 | Heating may cause a fire |
H250 | Catches fire spontaneously if exposed to air |
H251 | Self-heating; may catch fire |
H252 | Self-heating in large quantities; may catch fire |
H260 | In contact with water releases flammable gases which may ignite spontaneously |
H261 | In contact with water releases flammable gas |
H270 | May cause or intensify fire; oxidizer |
H271 | May cause fire or explosion; strong oxidizer |
H272 | May intensify fire; oxidizer |
H280 | Contains gas under pressure; may explode if heated |
H281 | Contains refrigerated gas; may cause cryogenic burns or injury |
H290 | May be corrosive to metals |
Health hazards | |
Code | Phrase |
H300 | Fatal if swallowed |
H301 | Toxic if swallowed |
H302 | Harmful if swallowed |
H303 | May be harmful if swallowed |
H304 | May be fatal if swallowed and enters airways |
H305 | May be harmful if swallowed and enters airways |
H310 | Fatal in contact with skin |
H311 | Toxic in contact with skin |
H312 | Harmful in contact with skin |
H313 | May be harmful in contact with skin |
H314 | Causes severe skin burns and eye damage |
H315 | Causes skin irritation |
H316 | Causes mild skin irritation |
H317 | May cause an allergic skin reaction |
H318 | Causes serious eye damage |
H319 | Causes serious eye irritation |
H320 | Causes eye irritation |
H330 | Fatal if inhaled |
H331 | Toxic if inhaled |
H332 | Harmful if inhaled |
H333 | May be harmful if inhaled |
H334 | May cause allergy or asthma symptoms or breathing difficulties if inhaled |
H335 | May cause respiratory irritation |
H336 | May cause drowsiness or dizziness |
H340 | May cause genetic defects |
H341 | Suspected of causing genetic defects |
H350 | May cause cancer |
H351 | Suspected of causing cancer |
H360 | May damage fertility or the unborn child |
H361 | Suspected of damaging fertility or the unborn child |
H361d | Suspected of damaging the unborn child |
H362 | May cause harm to breast-fed children |
H370 | Causes damage to organs |
H371 | May cause damage to organs |
H372 | Causes damage to organs through prolonged or repeated exposure |
H373 | May cause damage to organs through prolonged or repeated exposure |
Environmental hazards | |
Code | Phrase |
H400 | Very toxic to aquatic life |
H401 | Toxic to aquatic life |
H402 | Harmful to aquatic life |
H410 | Very toxic to aquatic life with long-lasting effects |
H411 | Toxic to aquatic life with long-lasting effects |
H412 | Harmful to aquatic life with long-lasting effects |
H413 | May cause long-lasting harmful effects to aquatic life |
H420 | Harms public health and the environment by destroying ozone in the upper atmosphere |
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