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CAS No. : | 105942-09-4 | MDL No. : | MFCD07368341 |
Formula : | C8H5BrFN | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | ZESZAIOGACKOMB-UHFFFAOYSA-N |
M.W : | 214.03 | Pubchem ID : | 2783149 |
Synonyms : |
|
Signal Word: | Danger | Class: | 8 |
Precautionary Statements: | P260-P264-P270-P280-P301+P330+P331-P303+P361+P353-P304+P340-P305+P351+P338-P310-P363-P405-P501 | UN#: | 3261 |
Hazard Statements: | H302-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 sodium hydrogencarbonate; In N,N-dimethyl-formamide; at 20℃; for 16h;Inert atmosphere; | Step 2 : tert-butyl 2-[(4-cyano-2-fluorobenzyl) amino]-3-methylbutanoateTo a stirred solution of <strong>[6070-59-3]tert-butyl 2-amino-3-methylbutanoate</strong> (8.5 g, 0.05 mol)in dry DMF (50 mL) under nitrogen, was added 4-cyano-2-fluoro-benzyl bromide (FluoroChem Ltd, 9.4 g, 0.044 mol) and NaHC03 (10.2 g, 0.12 mol). The resulting mixture was stirred at RT for 16 h. Water (70 mL) was added and the desired product was extracted with ethyl acetate (2x100 mL). The organic layer was washed with water (3x100 mL) and the solvent was dried over Na2S04 and concentrated under vacuum. The resulted residue was purified by column chromatography using petroleum ether/ ethyl acetate as eluent, affording of the title compound as colorless liquid. 1H NMR (DMSO-d6, 400 MHz) δ 7.77 (d, J = 10.2 Hz, 1 H), 7.67 (t, J = 1 .5 Hz, 1 H), 3.85-3.79 (m, 2H), 2.72 (m, 1 H), 2.49 (m, 1 H), 1.81 (m, 1 H), 1.37(s, 9H), 0.86 (m, 6H). | |
With sodium hydrogencarbonate; In N,N-dimethyl-formamide; at 20℃; for 16h;Inert atmosphere; | Step 1: 1- tert-butyl 2-[(4-cyano-2-fluorobenzyl)amino]-3-methylbutanoateTo a stirred solution of <strong>[6070-59-3]tert-butyl 2-amino-3-methylbutanoate</strong> (Bachem, 6.3 g, 0.036 mol) in dry DMF (50 mL) under nitrogen, was added 4-cyano-2-fluoro- benzyl bromide (6.2 g, 0.029 mol) and NaHC03 (6.09g, 0.073 mol). The resulting mixture was stirred for 16 h at RT. Water (70 mL) was added and extracted with ethyl acetate (2x100 mL). The organic layer was washed with water (3x100mL) and the solvent was dried over Na2S04 and concentrated under vacuum. The resulted residue was purified by column chromatography using petroleum ether/ ethyl acetate as eluent, affording the title compound as colorless liquid. 1H NMR (DMSO-d6, 400 MHz) δ 7.78 (d, J = 10.2 Hz, 1 H), 7.67 (t, J = 1.5 Hz, 2H) 3.81 (m, 2H), 2.71 (m, 1 H), 2.49 (m 1 H), 1 .81 (m, 1 H), 1 .37 (s, 9H), 0.88-0.84 (m, 6H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydrogencarbonate; In N,N-dimethyl-formamide; at 70℃; for 16h;Inert atmosphere; | Step 1: tert-butyl 2-[(4-cyano-2-fluorobenzyl)amino]-2-methylpropanoateTo a stirred solution of tert-butyl 2-amino-2-methylpropanoate (Bachem, 7.9 g, 0.05 mol) in dry DMF (50 mL) under nitrogen, was added 4-cyano-2-fluoro benzyl bromide (10.6 g, 0.05 mol) and NaHC03 (8.3 g, 0.099 mol) as a solid. The reaction mixture was stirred for 16 h at 70C. Water (70 mL) was added and extracted with ethyl acetate (100 mL). The organic layer was washed with water (3x100 mL) and the solvent was dried over Na2S04 and concentrated under vacuum. The residue was purified by column chromatography using silica gel (60-120 mesh) and petroleum ether/ ethyl acetate as eluent, affording the title compound as colourless liquid. 1H NMR (DMSO-de, 400 MHz) δ 7.78 (d, J = 10.0 Hz, 1 H), 7.71 -7.65 (m, 2H), 3.69 (d, J = 6.9 Hz, 2H), 2.55 (s, 1 H), 1 .44 (s, 9H), 1 .19 (s, 6H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In N,N-dimethyl-formamide; at 16℃; for 16.0h; | (0621) A mixture of 4-(bromomethyl)-3-fluorobenzonitrile (499 mg, 2.33 mmol) and 5-fluoro-2- methyl-1H-benzo[d]imidazole (350 mg, 2.33 mmol) in DMF (15 mL) was stirred at 16 C for 16 h. The mixture was washed with water (50 mL) and extracted with EtOAc (3 x 30 mL). The collected organic layers were washed with brine (30 mL) and dried over anhydrous Na2SO4. The mixure was filtered and the filtrate was concentrated to get the crude product. The crude product was purified by reverse-phase Prep-HPLC (preparative HPLC on a GILSON 281 instrument fitted with Phenomenex Synergi C18 250x21.2mmx4um using water and acetonitrile as the eluents. Mobile phase A: water, mobile phase B: acetonitrile (containing: 0.1%TFA-ACN). Gradient: 35-65%, 0-10 min; 100% B, 10.5-12.5min; 5% B, 13-15min) to give 3-fluoro-4-((5- fluoro-2-methyl-1H-benzo[d]imidazol-1-yl)methyl)benzonitrile as an oil. ESI-MS m/z [M + H]+ : 284.0. |
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