2-fluoro-4-trimethylsilylaniline

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 2-Bromo-5-cyano-terephthalic acid dimethyl ester (620 mg, 2.1 mmol), 2-fluoro-4-trimethylsilanyl-phenylamine (419 mg, 2.3 mmol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (62 mg, 0.10 mmol), potassium phosphate (486 mg, 2.30 mmol) and tris(dibenzylideneacetone)dipalladium (0) (29 mg, 0.05 mmol) were suspended in dioxane (20 ml) and the resultant mixture purged with argon. The reaction mixture was heated at reflux for 16 hours. The reaction was quenched by the addition of saturated aqueous ammonium chloride solution (20 ml) and the resultant mixture extracted with ethyl acetate (3×20 mL). The combined organic fractions were washed with brine (20 ml), dried (MgSO4) and concentrated in vacuo. The resultant residue was subjected to flash chromatography (SiO2, gradient 0-40% ethyl acetate in cyclohexane) to yield the title compound as a brown solid (0.5 g, 60%). LCMS (Method B): RT=4.74 min, M+H+=401. the resultant mixture purged with argon The reaction mixture was heated at reflux for 16 hours The reaction was quenched by the addition of saturated aqueous ammonium chloride solution (20 ml) the resultant mixture extracted with ethyl acetate (3×20 mL) The combined organic fractions were washed with brine (20 ml) dried (MgSO4) concentrated in vacuo

反応条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 4-bromo-2-fluoro-phenylamine (114 g, 0.6 mol) in anhydrous THF (750 mL) under inert atmosphere at −78° C. was added a 1.6M solution of nBuLi in hexanes (1500 mL, 2.4 mol) dropwise keeping the internal temperature below −60° C. The reaction mixture was treated dropwise with TMSCl (256 mL, 2.0 mol), keeping the internal temperature below −60° C. The reaction mixture was allowed to warm to 0° C. over a 1 hour period and poured into ice-cold 2M HCl (ca 1 L). The mixture was vigorously stirred for 10 min, then the organic layer was separated, washed with water followed by a saturated solution of potassium carbonate, dried (Na2SO4), filtered and concentrated to give the title compound as a light brown oil (89 g, 81%). the internal temperature below −60° C the internal temperature below −60° C the organic layer was separated washed with water dried (Na2SO4) filtered concentrated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A slurry of 10% wt. palladium on carbon (4.0 g) in IMS (25 mL) was added to a solution of (3-fluoro-4-nitro-phenyl)-trimethylsilane (62.0 g, 0.29 mol) in IMS (250 mL) and the reaction mixture flushed with nitrogen five times then hydrogen three times. The reaction mixture was then stirred under 3 bar pressure of hydrogen at room temperature for 4 hours. The reaction mixture was then purged with nitrogen again before filtering through a pad of Celite® with ethyl acetate washings. The filtrate was concentrated under reduced pressure to give the title compound as a light brown oil (53.0 g, quantitative). 1H NMR (CDCl3, 400 MHz) 7.16-7.09 (1H, m), 7.10 (1H, d, J=7.75 Hz), 6.81 (1H, t, J=8.16 Hz), 3.78 (2H, s), 0.26 (9H, s). the reaction mixture flushed with nitrogen five times The reaction mixture was then purged with nitrogen again before filtering through a pad of Celite® with ethyl acetate washings The filtrate was concentrated under reduced pressure

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