3-bromo-6-methoxybenzene-1,2-diol

反応条件: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 3-bromo-6-methoxycatechol (31 g) was dissolved in DMF (50 ml), mixed with 1,3-dibromopropane (36 ml) and potassium fluoride (42 g), stirred for 12 hours while heating at 110° C. The resultant was allowed to stand for cooling, mixed with water, and extracted with ether. The organic layer was washed with an aqueous sodium hydroxide solution, water, and a saturated aqueous sodium chloride solution in that order, dried over manganese sulfate, and evaporated under reduced pressure for removing the solvent. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=7/1) to give Compound IIbr-a (6.7 g, 18%) as a white solid. for cooling extracted with ether The organic layer was washed with an aqueous sodium hydroxide solution, water a saturated aqueous sodium chloride solution in that order, dried over manganese sulfate evaporated under reduced pressure for removing the solvent The residue was purified by silica gel column chromatography (hexane/ethyl acetate=7/1) to give Compound IIbr-a (6.7 g, 18%) as a white solid

反応条件: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 3-bromo-6-methoxycatechol (31 g) was dissolved in DMF (50 ml), mixed with 1,3-dibromopropane (36 ml) and potassium fluoride (42 g), stirred for 12 hours while heating at 110° C. The resultant was allowed to stand for cooling, mixed with water, and extracted with ether. The organic layer was washed with an aqueous sodium hydroxide solution, water, and a saturated aqueous sodium chloride solution in that order, dried over manganese sulfate, and evaporated under reduced pressure for removing the solvent. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=7/1) to give Compound IIbr-a (6.7 g, 18%) as a white solid. for cooling extracted with ether The organic layer was washed with an aqueous sodium hydroxide solution, water a saturated aqueous sodium chloride solution in that order, dried over manganese sulfate evaporated under reduced pressure for removing the solvent The residue was purified by silica gel column chromatography (hexane/ethyl acetate=7/1) to give Compound IIbr-a (6.7 g, 18%) as a white solid

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

実験手順: 3-bromo-6-methoxycatechol (16 g) was dissolved in DMF (50 ml), mixed with 1,2-dibromoethane (15 ml) and potassium fluoride (21 g), stirred for 6 hours while heating at 110EC. The resultant was allowed to stand for cooling, mixed with water, and extracted with ether. The organic layer was washed withan aqueous sodium hydroxide solution, water, and a saturated aqueous sodium chloride solution in that order, dried over manganese sulfate anhydride, and then, evaporated under reduced pressure for removing the solvent. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=4/1) to give Compound IIbo-a (5.9 g, 34%) as a white solid. while heating at 110EC for cooling extracted with ether The organic layer was washed withan aqueous sodium hydroxide solution, water a saturated aqueous sodium chloride solution in that order, dried over manganese sulfate anhydride evaporated under reduced pressure for removing the solvent The residue was purified by silica gel column chromatography (hexane/ethyl acetate=4/1) to give Compound IIbo-a (5.9 g, 34%) as a white solid

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

実験手順: 3-Bromo-6-methoxycatechol (3.87 g) and diphenyl-dichloromethane (4.61 g) were heated at 170° C. with stirring without a solvent. After being allowed to stand for cooling, a saturated aqueous solution of sodium bicarbonate was added to the mixture, followed by extraction with ether. The organic layer was washed with a saturated saline and dried over anhydrous magnesium sulfate, and the solvent was distilled off under reduced pressure. The residue was triturated with methanol to give Compound IIbl-a (4.7 g, 69%) as a white solid. for cooling followed by extraction with ether The organic layer was washed with a saturated saline dried over anhydrous magnesium sulfate the solvent was distilled off under reduced pressure The residue was triturated with methanol to give Compound IIbl-a (4.7 g, 69%) as a white solid

反応条件: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 3-Bromo-6-methoxycatechol (23.4 g) was dissolved in DMF (150 ml), and dibromomethane (15.4 ml) and potassium fluoride (31.1 g) were added thereto, followed by heating at 110° C. for 6 hours with stirring. After being allowed to stand for cooling, water was added to the mixture followed by extraction with ether. The organic layer was washed with an aqueous solution of sodium hydroxide, with water, and with a saturated saline, and dried over anhydrous magnesium sulfate, and the solvent was distilled off under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=50/1) to give Compound IIbj-a (5.6 g, 40%) as a white solid. for cooling followed by extraction with ether The organic layer was washed with an aqueous solution of sodium hydroxide, with water with a saturated saline, and dried over anhydrous magnesium sulfate the solvent was distilled off under reduced pressure The residue was purified by silica gel column chromatography (hexane/ethyl acetate=50/1) to give Compound IIbj-a (5.6 g, 40%) as a white solid

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

実験手順: To a stirring solution of 3-bromo-6-methoxybenzene-1,2-diol (500 mg, 2.27 mmol) in acetone (40 mL) at 0° C. was added potassium carbonate (313 mg, 2.27 mmol) and methoxymethyl chloride (183 mg, 2.27 mmol) and the resultant reaction mixture was stirred at RT for 2 h. The reaction mixture was filtered and filtrate was concentrated under reduced pressure. Purification of the residue by column chromatography (silica gel, 0-8% ethyl acetate in pet ether) afforded 3-Bromo-6-methoxy-2-(methoxymethoxy)phenol as a liquid (230 mg, 38%). the resultant reaction mixture The reaction mixture was filtered filtrate was concentrated under reduced pressure Purification of the residue by column chromatography (silica gel, 0-8% ethyl acetate in pet ether)

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

実験手順: To a stirring solution of 3-bromo-6-methoxybenzene-1,2-diol (500 mg, 2.28 mmol) in acetone (40 mL) at 0° C. was added potassium carbonate (314 mg, 2.28 mmol) and methoxymethyl chloride (184 mg, 2.28 mmol) and the resultant reaction mixture was stirred at RT for 2 h. The reaction mixture was filtered and the filtrate was concentrated under reduced pressure Purification by column chromatography (silica gel, 0-8% ethyl acetate in pet ether) afforded 3-Bromo-6-methoxy-2-(methoxymethoxy)phenol as a liquid (230 mg, 38%). the resultant reaction mixture The reaction mixture was filtered the filtrate was concentrated under reduced pressure Purification by column chromatography (silica gel, 0-8% ethyl acetate in pet ether)

反応条件: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 3-bromo-6-methoxycatechol (31 g) was dissolved in DMF (50 ml), mixed with 1,3-dibromopropane (36 ml) and potassium fluoride (42 g), stirred for 12 hours while heating at 110° C. The resultant was allowed to stand for cooling, mixed with water, and extracted with ether. The organic layer was washed with an aqueous sodium hydroxide solution, water, and a saturated aqueous sodium chloride solution in that order, dried over manganese sulfate, and evaporated under reduced pressure for removing the solvent. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=7/1) to give Compound IIbr-a (6.7 g, 18%) as a white solid. for cooling extracted with ether The organic layer was washed with an aqueous sodium hydroxide solution, water a saturated aqueous sodium chloride solution in that order, dried over manganese sulfate evaporated under reduced pressure for removing the solvent The residue was purified by silica gel column chromatography (hexane/ethyl acetate=7/1) to give Compound IIbr-a (6.7 g, 18%) as a white solid

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

実験手順: 3-Bromo-6-methoxycatechol (3.87 g) and diphenyl-dichloromethane (4.61 g) were heated at 170° C. with stirring without a solvent. After being allowed to stand for cooling, a saturated aqueous solution of sodium bicarbonate was added to the mixture, followed by extraction with ether. The organic layer was washed with a saturated saline and dried over anhydrous magnesium sulfate, and the solvent was distilled off under reduced pressure. The residue was triturated with methanol to give Compound IIbl-a (4.7 g, 69%) as a white solid. for cooling followed by extraction with ether The organic layer was washed with a saturated saline dried over anhydrous magnesium sulfate the solvent was distilled off under reduced pressure The residue was triturated with methanol to give Compound IIbl-a (4.7 g, 69%) as a white solid

反応条件: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 3-Bromo-6-methoxycatechol (23.4 g) was dissolved in DMF (150 ml), and dibromomethane (15.4 ml) and potassium fluoride (31.1 g) were added thereto, followed by heating at 110° C. for 6 hours with stirring. After being allowed to stand for cooling, water was added to the mixture followed by extraction with ether. The organic layer was washed with an aqueous solution of sodium hydroxide, with water, and with a saturated saline, and dried over anhydrous magnesium sulfate, and the solvent was distilled off under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=50/1) to give Compound IIbj-a (5.6 g, 40%) as a white solid. for cooling followed by extraction with ether The organic layer was washed with an aqueous solution of sodium hydroxide, with water with a saturated saline, and dried over anhydrous magnesium sulfate the solvent was distilled off under reduced pressure The residue was purified by silica gel column chromatography (hexane/ethyl acetate=50/1) to give Compound IIbj-a (5.6 g, 40%) as a white solid

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

実験手順: To a solution of 1-bromo-2,3-dihydroxy-4-methoxy-benzene (5.0 g) and anhydrous tetrahydrofuran (20 mL) at 0° C. under argon was added diisopropylethylamine (8.0 mL). The solution was stirred for 15 min, methyloxymethyl chloride (3.5 mL) was added, and the reaction mixture stirred for 3 hours. The solution was poured into water (250 mL), extracted with dichloromethane and the solvent removed in vacuo to provide an orange oil. The oil was purified by flash column chromatography (hexane-ethyl acetate, 2:1) to yield a clear oil (6.4 g, 91%): EIMS m/z 308 (M+, 81Br), 306 (M+, 79Br), 232, 230, 45; IR (neat, cm−1) vmax 2963, 2836, 1221, 1159, 1084, 966; 1H NMR δ 7.25 (1H, d, J=9.0 Hz, H5), 6.61 (1H, d, J=9.0 Hz, H4), 5.20 (2H, s, OCH2), 5.13 (2H, s, OCH2), 3.84 (3H, s, OCH3), 3.66 (3H, s, OCH3), 3.59 (3H, s, OCH3); 13C—NMR (75.5 MHZ) δ 153.31, 148.24, 140.05, 127.49, 108.94, 108.73, 99.39, 98.73, 58.14, 57.46, 56.11. Anal. Calcd. For C11H15O5Br: C, 43.02; H, 4.92. Found: C, 42.86; H, 4.93. the reaction mixture stirred for 3 hours extracted with dichloromethane the solvent removed in vacuo to provide an orange oil The oil was purified by flash column chromatography (hexane-ethyl acetate, 2:1)

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

実験手順: Aldehyde 12 (23 g) was suspended in 2% sodium hydroxide (300 mL) and a solution of 30% hydrogen peroxide (15.8 g, 1.4 eq.) was added. After 2 hours, another portion of 30% hydrogen peroxide (1.4 eq.) was added and the solution stirred overnight. The reaction mixture was acidified, extracted with dichloromethane, washed with sodium thiosulfate and the solvent removed in vacuo to afford a tan solid. The solid was recrystallized from methanol to afford colorless crystals (14 g, 64%): m.p. 122.3-124.3° C., lit20 m.p. 124-126° C.; EIMS m/z 220 (M+, 81Br), 218 (M+, 79Br), 205, 203, 177, 175, 95; 1HNMR δ 6.99 (1H, d, J=9.0 Hz, H5), 6.42 (1H, d, J=9.0 Hz, H4), 5.56 (1H, s, OH), 5.51 (1H, s, OH), 3.88 (3H, s, OCH3); 13C—NMR (75.5 MHZ) δ 146.59, 140.95, 133.47, 122.21, 104.35, 101.55, 56.31; Anal. Calcd. For C7H7O3Br: C, 38.39; H, 3.22. Found: C, 38.47; H, 3.36. extracted with dichloromethane washed with sodium thiosulfate the solvent removed in vacuo to afford a tan solid The solid was recrystallized from methanol