2-bromo-5-methoxyphenol

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:65.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture of 1-bromo-2-hydroxy-4-methoxy benzene (68.3 g, 0.336 moles), anhydrous potassium carbonate (51.2 g 0.37 moles) and 0.5 L of N,N-dimethylformamide was heated to 65° C. Benzyloxyethylbromide (76.0 g, 0.353 moles) was added dropwise over 0.5 hr. After stirring for 1.5 hr. at 65° C., the reaction mixture was cooled and filtered. The filtrate was diluted with 1 L of deionized water, and extracted with 3×0.5 L ethyl acetate. The organic extracts were washed with brine, dried over MgSO4, and concentrated in vacuo. Distillation gave 93 g (83%) of product as a yellow liquid (b.p. 170°-175° C., 0.5 mm). at 65° C., the reaction mixture was cooled filtered The filtrate was diluted with 1 L of deionized water extracted with 3×0.5 L ethyl acetate The organic extracts were washed with brine dried over MgSO4 concentrated in vacuo Distillation

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

実験手順: To a suspension of NaH (2.5 g, 0.06 mol) in dry DMF (100 mL) at 0° C. was added solution of 1-bromo-2-hydroxy-4-methoxybenzene (10.6 g, 0.05 mol). After stirring at 0° C. for 30 min. bromomethyl methyl ether (7.8 g, 0.06 mmol) were dropwise added. The mixture was warmed to room temperature over 20 min. and then stirred for 2 h, it was then quenched cautiously by the addition of cold dilute HCl and extracted with EtOAc. The EtOAc extract was washed successively with; H2O, 5% aqueous NaHCO3, H2O and finally brine. After drying (MgSO4) filtration and evaporation gave liquid. The product was purified by distillation (85° C., 0.2 mm Hg) to give the title compound as a colorless oil (13.7 g, 97%). were dropwise added it was then quenched cautiously by the addition of cold dilute HCl extracted with EtOAc The EtOAc extract was washed successively with After drying (MgSO4) filtration and evaporation gave liquid The product was purified by distillation (85° C., 0.2 mm Hg)

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

実験手順: 3-Bromo-2-hydroxy-6-methoxybenzoic acid [T. de Paulis et. al., J. Med. Chem., (1985), 28, 1263-1269] (5 g, 0.02 mol) was heated in quinoline (200 mL) at 160° C. for 1 h. On cooling, the product was partitioned between Et2O and 3M HCl. The organic extract was washed with water and brine then dried (MgSO4), filtered and evaporated to give the title compound which was recrystallized from 5% ethyl acetate/hexane (4 g, 97%); m.p. 40°-42° C. Anal. Calc. for C7H7 BrO2 : C, 41.41; H, 3.48. Found C, 41.39; H, 3.37. On cooling the product was partitioned between Et2O and 3M HCl The organic extract was washed with water and brine then dried (MgSO4) filtered evaporated

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

実験手順: To a solution of 1-Bromo-2-hydroxy-4-methoxybenzene (5.00 g, 24.60 mmol) in DMF was added 60% sodium hydride (1.97 g, 49.20 mmol) at 0° C. under argon. The mixture was allowed to stir at 0° C. for 15 minutes, then 90% bromomethyl methylether (4.10 g, 29.50 mmol) was added. After stirring for 1 h at 0° C. the reaction was quenched with water. The mixture was extracted with ethyl acetate and the combined organic extracts were washed with brine and dried (Na2SO4). Removal of the solvent afforded the title compound as an oil (6.5 g, quantitative yield). 1H NMR (400 MHz, CDCl3) δ 7.41 (d, 2H), 6.76 (d, 1H), 6.47 (dd, 1H), 5.24 (s, 2H), 3.87 (s, 3H), 3.53 (s, 3H). After stirring for 1 h at 0° C. the reaction was quenched with water The mixture was extracted with ethyl acetate the combined organic extracts were washed with brine dried (Na2SO4) Removal of the solvent

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反応条件: temp:0.00; pressure:0.00; stir: