2-bromo-5-methoxy-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:75.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A solution of 2-bromo-5-methoxy-1,3-dimethyl-benzene ((Example 192: step a) 1.01 g, 4.70 mmol) in CCl4 (50 mL) was treated with N-bromosuccinamide and AIBN (catalytic amount) and heated to 75° C. 3.5 h. The reaction was diluted with CH2Cl2 and washed with saturated aqueous NaHCO3. The organic layer was dried over MgSO4 and concentrated in vacuo to afford the product 2-bromo-1-bromomethyl-5-methoxy-3-methyl-benzene (1.27 g, 92%) as a pale orange solid. 1H NMR (CDCl3): δ 6.641 (s, 2H), 4.601 (s, 2H), 3.760 (s, 3H), 2.380 (s, 3H). 3.5 h washed with saturated aqueous NaHCO3 The organic layer was dried over MgSO4 concentrated in vacuo

反応条件: temp:75.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A solution of 2-bromo-5-methoxy-1,3-dimethyl-benzene ((Example 192: step a) 1.01 g, 4.70 mmol) in CCl4 (50 mL) was treated with N-bromosuccinamide and AIBN (catalytic amount) and heated to 75° C. 3.5 h. The reaction was diluted with CH2Cl2 and washed with saturated aqueous NaHCO3. The organic layer was dried over MgSO4 and concentrated in vacuo to afford the product 2-bromo-1-bromomethyl-5-methoxy-3-methyl-benzene (1.27 g, 92%) as a pale orange solid. 1H NMR (CDCl3): δ 6.641 (s, 2H), 4.601 (s, 2H), 3.760 (s, 3H), 2.380 (s, 3H). 3.5 h washed with saturated aqueous NaHCO3 The organic layer was dried over MgSO4 concentrated in vacuo

反応条件: temp:40.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A solution of 4-bromo-3,5-dimethylphenol (1.00 g, 4.97 mmol) in acetone (40 mL) was treated with solid CsCO3 (1.17 g, 4.97 mmol) and methyl iodide (0.310 mL, 4.97 mmol) and heated to 40° C. for 3 h. Additional methyl iodide (0.310 mL, 4.97 mmol) was added over the course of the reaction to replace that lost to evaporation. The acetone was removed in vacuo. The resulting white solid residue was partitioned between water and CH2Cl2. The layers were separated and the aqueous layer was further extracted with CH2Cl2 (2×25 mL). The combined organic layers were washed with water (1×25 mL) and dried over MgSO4. The solvent was removed in vacuo to afford the product 2-bromo-5-methoxy-1,3-dimethyl-benzene (1.01 g, 94%) as a colorless oil, which slowly solidified upon standing. 1H NMR (CDCl3): δ 6.644 (s, 2H), 3.762 (s, 3H), 2.382 (s, 6H). that lost to evaporation The acetone was removed in vacuo The resulting white solid residue was partitioned between water and CH2Cl2 The layers were separated the aqueous layer was further extracted with CH2Cl2 (2×25 mL) The combined organic layers were washed with water (1×25 mL) dried over MgSO4 The solvent was removed in vacuo

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

実験手順: To a 0° C. solution of 4-bromo-3,5-dimethylphenol (1.00 g, 4.98 mmol) in DMF (10.0 mL) was added iodomethane (1.41 g, 9.96 mmol) and potassium carbonate (1.37 g, 9.96 mmol). The mixture was stirred for 5 h at room temperature. The mixture was poured into water and extracted with ethyl acetate (15 ml*3). The combined organic layers were dried over Na2SO4 and concentrated under reduced pressure. The crude material was purified by silica gel chromatography to give 2-bromo-5-methoxy-1,3-dimethylbenzene (1.00 g) as a yellow oil. 1H NMR (400 MHz, CDCl3) δ 6.57 (s, 2H), 3.69 (s, 3H), 2.31 (s, 6H). extracted with ethyl acetate (15 ml*3) The combined organic layers were dried over Na2SO4 concentrated under reduced pressure The crude material was purified by silica gel chromatography

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir: