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CAS No. : | 102684-91-3 | MDL No. : | MFCD04973760 |
Formula : | C8H4BrF3O | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | CSOBJYGHQOLWOD-UHFFFAOYSA-N |
M.W : | 253.02 | Pubchem ID : | 7018047 |
Synonyms : |
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Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P305+P351+P338 | 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 |
---|---|---|
76% | Example 108 Preparation of 2-methyl-5-phenyl-8-(trifluoromethyl)-2,3,4,5-tetrahydro-1H-benzo[c]azepine, L-tartrate salt Step A: To a solution of the 2-bromo-5-trifluoromethyl-benzonitrile (2.6 g, 10.4 mmol) in toluene (20 mL) at -78 C. was added diisobutylaluminium hydride (21 mL, 21 mmol, 1.0 M in toluene) cooled to -78 C. by cannula. The solution was stirred at -78 to -50 C. for 2 hours. Water (5 mL) was added slowly to the reaction and the reaction was allowed to warm up to room temperature. The mixture was adjusted to pH 10 with NaOH. The product was extracted with dichloromethane, washed with saturated sodium bicarbonate and brine, dried over sodium sulfate and concentrated. The residue was purified by flash chromatography (hexanes/ether 90:10) to give the desired aldehyde (2.0 g, 76%) as a dark solid: 1H NMR (CDCl3, 300 MHz) delta 10.38 (s, 1H), 8.18 (s, 1H), 7.68 (d, J=8.7 Hz, 1H), 7.54 (d, J=8.7 Hz, 1H). | |
To a solution of <strong>[1483-55-2]2-bromo-5-(trifluoromethyl)benzonitrile</strong> (10.0 g, 40 mmol) in dichloromethane (100 mL) was dropwise added a 1.0 M solution of diisobutylaluminum hydride in hexane (48 mL). The resulting solution was stirred under nitrogen at ambient temperature for 1 h and was then diluted by addition of ether (100 mL). After cooling in an ice bath, a 3 N solution of HCl was carefully added, and the mixture was vigorously stirred at ambient temperature for 15 min. The organic layer was washed with brine, dried (MgSO4) and evaporated. The resulting oil was purified by flash chromatography (5% EtOAc/hexane) affording 5 g of 2-bromo-5-trifluoromethylbenzaldehyde. 1H NMR (CDCl3) delta 10.39 (s, 1H), 8.18 (d, J=2 Hz, 1H), 7.82 (d, J=8.8 Hz, 1H), 7.70 (dd, J=8.5 Hz, 2 Hz, 1H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With diisobutylaluminium hydride; In hydrogenchloride; dichloromethane; | (a) 2-(8-Phenyloctyl)-5-trifluoromethyl benzaldehyde To a solution of <strong>[1483-55-2]2-bromo-5-trifluoromethyl benzonitrile</strong> (20.16 mmoles) in methylene chloride (50 ml), under argon at room temperature, was added diisobutylaluminum hydride (25 mmoles, 25 ml hexane) dropwise and the resulting solution was stirred for 30 minutes. The reaction mixture was diluted with ether (50 ml), cooled in ice and quenched by the careful addition of hydrochloric acid (50 ml, 3N). The ice bath was removed and the mixture was stirred vigorously for 15 minutes. The organic layer was washed with brine (50 ml), treated with magnesium sulfate-charcoal and evaporated. The resulting oil was purified by distillation to give 2-bromo-5-trifluoromethyl benzaldehyde, bp 50-55 C. at 0.05 mm Hq. | |
With diisobutylaluminium hydride; In hydrogenchloride; dichloromethane; | (a) 2-(8-Phenyloctyl)-5-trifluoromethyl benzaldehyde To a solution of <strong>[1483-55-2]2-bromo-5-trifluoromethyl benzonitrile</strong> (20.16 mmoles) in methylene chloride (50 ml), under argon at room temperature, was added diisobutylaluminum hydride (25 mmoles, 25 ml hexane) dropwise and the resulting solution was stirred for 30 minutes. The reaction mixture was diluted with ether (50 ml), cooled in ice and quenched by the careful addition of hydrochloric acid (50 ml, 3 N). The ice bath was removed and the mixture was stirred vigorously for 15 minutes. The organic layer was washed with brine (50 ml), treated with magnesium sulfate-charcoal and evaporated. The resulting oil was purified by distillation to give 2-bromo-5-trifluoromethyl benzaldehyde, bp 50-55 C. at 0.05 mm Hg. | |
With diisobutylaluminium hydride; In hydrogenchloride; dichloromethane; | (a) 2-(8-Phenyloctyl)-5-trifluoromethyl benzaldehyde To a solution of <strong>[1483-55-2]2-bromo-5-trifluoromethyl benzonitrile</strong> (20.16 mmoles) in methylene chloride (50 ml), under argon at room temperature, was added diisobutylaluminum hydride (25 mmoles, 25 ml hexane) dropwise and the resulting solution was stirred for 30 minutes. The reaction mixture was diluted with ether (50 ml), cooled in ice and quenched by the careful addition of hydrochloric acid (50 ml, 3N). The ice bath was removed and the mixture was stirred vigorously for 15 minutes. The organic layer was washed with brine (50 ml), treated with magnesium sulfate-charcoal and evaporated. The resulting oil was purified by distillation to give 2-bromo-5-trifluoromethyl benzaldehyde, bp 50-55 C. at 0.05 mm Hg. |
With diisobutylaluminium hydride; In hydrogenchloride; dichloromethane; | (a) 2-(8-Phenyloctyl)-5-trifluoromethyl benzaldehyde To a solution of <strong>[1483-55-2]2-bromo-5-trifluoromethyl benzonitrile</strong> (20.16 mmoles) in methylene chloride (50 ml), under argon at room temperature, was added diisobutylaluminum hydride (25 mmoles, 25 ml hexane) dropwise and the resulting solution was stirred for 30 minutes. The reaction mixture was diluted with ether (50 ml), cooled in ice and quenched by the careful addition of hydrochloric acid (50 ml, 3N). The ice bath was removed and the mixture was stirred vigorously for 15 minutes. The organic layer was washed with brine (50 ml), treated with magnesium sulfate-charcoal and evaporated. The resulting oil was purified by distillation to give 2-bromo-5-trifluoromethyl benzaldehyde, bp 50-55 C. at 0.05 mm Hg. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In hydrogenchloride; dichloromethane; | (a) 2-(8-Phenyloctyl)-5-trifluoromethyl benzaldehyde To a solution of <strong>[1483-55-2]2-bromo-5-trifluoromethyl benzonitrile</strong> (20.16 mmoles) in methylene chloride (50 ml), under argon at room temperature, was added diisobutyl-aluminum hydride (25 mmoles, 25 ml hexane) dropwise and the resulting solution was stirred for 30 minutes. The reaction mixture was diluted with ether (50 ml), cooled in ice and quenched by the careful addition of hydrochloric acid (50 ml, 3N). The ice bath was removed and the mixture was stirred vigorously for 15 minutes. The organic layer was washed with brine (50 ml), treated with magnesium sulfate-charcoal and evaporated. The resulting oil was purified by distillation to give 2-bromo-5-trifluoromethyl benzaldehyde, bp 50-55 C. at 0.05 mm Hg. |
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