2-bromo-1,3-dimethylbenzene

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-m-xylene (186 mg, 1.01 mmol) reacted with 2-methylphenylboronic acid (164 mg, 1.21 mmol) using 2/4 mol % of Pd(dba)2/Ph5FcP(t-Bu)2 and K3PO4 (640 mg, 3.00 mmol) in toluene at 100° C. to give the title compound (170 mg, 87%) as a colorless oil: 1H-NMR (400 MHz, CDCl3): δ 7.31-7.25 (m, 3H), 7.20-7.11 (m, 3H), 7.03 (m, 1H), 1.98 (s, 3H), 1.96 (s, 6H). at 100° C.

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

実験手順: 2-Bromo-m-xylene (77 mg, 0.42 mmol) reacted with 4-chlorophenylboronic acid (94 mg, 0.60 mmol) using 1/2 mol % of Pd(dba)2/Ph5FcP(t-Bu)2 and K3PO4 (254 mg, 1.20 mmol) in toluene at 100° C. to give the title compound (85 mg, 95%) as a colorless oil: 1H-NMR (400 MHz, CDCl3): δ 7.27 (d, 2H, J=8.0 Hz), 7.14 (d, 2H, J=8.0 Hz), 7.06 (d, 1H, J=7.6 Hz), 6.98 (bs, 1H), 6.92 (s, 1H), 2.25 (s, 3H), 2.11 (s, 3H). 13C{1H}-NMR (100 MHz, CDCl3): δ 140.44, 135.30,132.66, 132.04, 130.46, 130.33, 128.23, 128.18, 20.88, 19.88. GC/MS(EI): m/z 216 (M+), 181, 166, 89. at 100° C.

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

実験手順: An oven dried resealable Schlenk tube was evacuated and backfilled with argon and charged with palladium acetate (2.2 mg, 0.01 mmol, 1.0 mol %), 2-(di-tert-butylphosphino)biphenyl (6.0 mg, 0.020 mmol, 2.0 mol %), phenylboronic acid (183 mg, 1.5 mmol), and potassium fluoride (174 mg, 3.0 mmol). The tube was evacuated and backfilled with argon, and THF (1 mL) and 2-bromo-m-xylene (0.144 mL, 1.0 mmol) were added through a rubber septum. The tube was sealed with a teflon screwcap, and the reaction mixture was stirred at 65° C. until the starting aryl bromide had been completely consumed as judged by GC analysis. The reaction mixture was then diluted with ether (30 mL), filtered through celite, and concentrated. The crude material was purified by flash chromatography on silica gel to afford 144 mg (79%) of the title compound. An oven dried resealable Schlenk tube was evacuated The tube was evacuated were added through a rubber septum had been completely consumed The reaction mixture was then diluted with ether (30 mL) filtered through celite concentrated The crude material was purified by flash chromatography on silica gel

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: Fuming nitric acid (>90% yellow fuming HNO3) is slowly added to a solution of 2-bromo-m-xylene (20 g, 150 mmol) in HOAc (100 mL) cooled in an ice bath (above freezing point). The resulting mixture is allowed to warm to room temperature, stirred for 1 hour, and heated at 80° C. for 2 h or until the reaction is complete by GC/MS analysis following micro-scale base work-up. The reaction mixture is cooled to room temperature and poured into ice/water with stirring. The resulting yellow precipitates are collected by suction filtration and air dried to obtain 2,6-dimethyl-3-nitrobromobenzene. cooled in an ice bath (above freezing point) heated at 80° C. for 2 h or until the reaction The reaction mixture is cooled to room temperature with stirring The resulting yellow precipitates are collected by suction filtration and air dried