2-(2-bromo-4,5-dimethoxyphenyl)ethanamine

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

実験手順: 2-Bromo-4,5-dimethoxylbenzeneethanamine (3.5 g 13.2 mmol) was dissolved and stirred in 50 mL dry acetonitrile. 2.14 mL (1.1 equiv) phthaloyl dichloride and 7 mL (3 equiv) Hünig's base were added. The mixture was stirred at room temperature overnight. Acetonitrile was removed; the remaining product was taken up in dichloromethane and washed with basic water (pH=11). The aqueous wash was extracted with dichloromethane 15 mL×3. The organic fractions were combined and dried over sodium sulfate. Solvent was removed to give the crude product, which was then purified by column chromatography. Calculated yield: 1.8 g (34%). Acetonitrile was removed washed with basic water (pH=11) The aqueous wash was extracted with dichloromethane 15 mL×3 dried over sodium sulfate Solvent was removed

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

実験手順: 2-Bromo-4,5-dimethoxylbenzeneethanamine (3.5 g 13.2 mmol) was dissolved and stirred in 50 mL dry acetonitrile. 2.14 mL (1.1 equiv) phthaloyl dichloride and 7 mL (3 equiv) Hünig's base were added. The mixture was stirred at room temperature overnight. Acetonitrile was then removed, and the remaining product was taken up in dichloromethane and washed with basic water (pH=11). The aqueous wash was extracted with dichloromethane 3×15 mL. The organic fractions were combined and dried over sodium sulfate. Solvent was removed to give the crude product, which was then purified by column chromatography. Calculated yield: 1.8 g (34%). Acetonitrile was then removed washed with basic water (pH=11) The aqueous wash was extracted with dichloromethane 3×15 mL dried over sodium sulfate Solvent was removed

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

実験手順: Bromine (1.1 mL, 22 mmol) in acetic acid (10 mL) was slowly added into a vigorously stirred solution of 2-(3,4-dimethoxyphenyl)ethylamine (3.4 mL, 20 mmol) in 50 mL acetic acid. 2-bromo-4,5-dimethoxylbenzeneethanamine precipitated out after 15 minutes. The mixture was stirred for another two hours, filtered, and washed with dichloromethane 10 mL×3 and petroleum ether 10 mL×3. The resulting solid was taken up in water and the pH was brought to 10 with aqueous KOH solution. Extraction with dichloromethane followed by evaporation of the solvent yielded 4.12 g (78%) 2-Bromo-4,5-dimethoxylbenzeneethanamine. The crude product was dried under dynamic vacuum overnight and used without further purification. 2-bromo-4,5-dimethoxylbenzeneethanamine precipitated out after 15 minutes filtered washed with dichloromethane 10 mL×3 and petroleum ether 10 mL×3 Extraction with dichloromethane followed by evaporation of the solvent

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

実験手順: Bromine (1.1 mL, 22 mmol) in acetic acid (10 mL) was slowly added into a vigorously stirred solution of 2-(3,4-dimethoxyphenyl)ethylamine (3.4 mL, 20 mmol) in 50 mL acetic acid. 2-bromo-4,5-dimethoxylbenzeneethanamine precipitated out after 15 minutes. The mixture was stirred for another two hours, filtered, and washed with dichloromethane 10 mL×3 and petroleum ether 10 mL×3. The resulting solid was taken up in water and the pH was brought to 10 with aqueous KOH solution. Extraction with dichloromethane followed by evaporation of the solvent yielded 4.12 g (78%) 2-Bromo-4,5-dimethoxylbenzeneethanamine. The crude product was dried under dynamic vacuum overnight and used without further purification. 2-bromo-4,5-dimethoxylbenzeneethanamine precipitated out after 15 minutes filtered washed with dichloromethane 10 mL×3 and petroleum ether 10 mL×3 Extraction with dichloromethane followed by evaporation of the solvent

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

実験手順: 2-Bromo-4,5-dimethoxylbenzeneethanamine (3.5 g 13.2 mmol) was dissolved and stirred in 50 mL dry acetonitrile. 2.14 mL (1.1 equiv) phthaloyl dichloride and 7 mL (3 equiv) Hünig's base were added. The mixture was stirred at room temperature overnight. Acetonitrile was removed; the remaining product was taken up in dichloromethane and washed with basic water (pH=11). The aqueous wash was extracted with dichloromethane 15 mL×3. The organic fractions were combined and dried over sodium sulfate. Solvent was removed to give the crude product, which was then purified by column chromatography. Calculated yield: 1.8 g (34%). Acetonitrile was removed washed with basic water (pH=11) The aqueous wash was extracted with dichloromethane 15 mL×3 dried over sodium sulfate Solvent was removed

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

実験手順: 2-Bromo-4,5-dimethoxylbenzeneethanamine (3.5 g 13.2 mmol) was dissolved and stirred in 50 mL dry acetonitrile. 2.14 mL (1.1 equiv) phthaloyl dichloride and 7 mL (3 equiv) Hünig's base were added. The mixture was stirred at room temperature overnight. Acetonitrile was removed; the remaining product was taken up in dichloromethane and washed with basic water (pH=11). The aqueous wash was extracted with dichloromethane 15 mL×3. The organic fractions were combined and dried over sodium sulfate. Solvent was removed to give the crude product, which was then purified by column chromatography. Calculated yield: 1.8 g (34%). Acetonitrile was removed washed with basic water (pH=11) The aqueous wash was extracted with dichloromethane 15 mL×3 dried over sodium sulfate Solvent was removed

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

実験手順: 2-Bromo-4,5-dimethoxylbenzeneethanamine (3.5 g 13.2 mmol) was dissolved and stirred in 50 mL dry acetonitrile. 2.14 mL (1.1 equiv) phthaloyl dichloride and 7 mL (3 equiv) Hünig's base were added. The mixture was stirred at room temperature overnight. Acetonitrile was then removed, and the remaining product was taken up in dichloromethane and washed with basic water (pH=11). The aqueous wash was extracted with dichloromethane 3×15 mL. The organic fractions were combined and dried over sodium sulfate. Solvent was removed to give the crude product, which was then purified by column chromatography. Calculated yield: 1.8 g (34%). Acetonitrile was then removed washed with basic water (pH=11) The aqueous wash was extracted with dichloromethane 3×15 mL dried over sodium sulfate Solvent was removed

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

実験手順: Bromine (1.1 mL, 22 mmol) in acetic acid (10 mL) was slowly added into a vigorously stirred solution of 2-(3,4-dimethoxyphenyl)ethylamine (3.4 mL, 20 mmol) in 50 mL acetic acid. 2-bromo-4,5-dimethoxylbenzeneethanamine precipitated out after 15 minutes. The mixture was stirred for another two hours, filtered, and washed with dichloromethane 10 mL×3 and petroleum ether 10 mL×3. The resulting solid was taken up in water and the pH was brought to 10 with aqueous KOH solution. Extraction with dichloromethane followed by evaporation of the solvent yielded 4.12 g (78%) 2-Bromo-4,5-dimethoxylbenzeneethanamine. The crude product was dried under dynamic vacuum overnight and used without further purification. 2-bromo-4,5-dimethoxylbenzeneethanamine precipitated out after 15 minutes filtered washed with dichloromethane 10 mL×3 and petroleum ether 10 mL×3 Extraction with dichloromethane followed by evaporation of the solvent

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

実験手順: 2-Bromo-4,5-dimethoxylbenzeneethanamine (3.5 g 13.2 mmol) was dissolved and stirred in 50 mL dry acetonitrile. 2.14 mL (1.1 equiv) phthaloyl dichloride and 7 mL (3 equiv) Hünig's base were added. The mixture was stirred at room temperature overnight. Acetonitrile was then removed, and the remaining product was taken up in dichloromethane and washed with basic water (pH=11). The aqueous wash was extracted with dichloromethane 3×15 mL. The organic fractions were combined and dried over sodium sulfate. Solvent was removed to give the crude product, which was then purified by column chromatography. Calculated yield: 1.8 g (34%). Acetonitrile was then removed washed with basic water (pH=11) The aqueous wash was extracted with dichloromethane 3×15 mL dried over sodium sulfate Solvent was removed

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

実験手順: Bromine (1.1 mL, 22 mmol) in acetic acid (10 mL) was slowly added into a vigorously stirred solution of 2-(3,4-dimethoxyphenyl)ethylamine (3.4 mL, 20 mmol) in 50 mL acetic acid. 2-bromo-4,5-dimethoxylbenzeneethanamine precipitated out after 15 minutes. The mixture was stirred for another two hours, filtered, and washed with dichloromethane 10 mL×3 and petroleum ether 10 mL×3. The resulting solid was taken up in water and the pH was brought to 10 with aqueous KOH solution. Extraction with dichloromethane followed by evaporation of the solvent yielded 4.12 g (78%) 2-Bromo-4,5-dimethoxylbenzeneethanamine. The crude product was dried under dynamic vacuum overnight and used without further purification. 2-bromo-4,5-dimethoxylbenzeneethanamine precipitated out after 15 minutes filtered washed with dichloromethane 10 mL×3 and petroleum ether 10 mL×3 Extraction with dichloromethane followed by evaporation of the solvent

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

実験手順: 2-Bromo-4,5-dimethoxylbenzeneethanamine (3.5 g 13.2 mmol) was dissolved and stirred in 50 mL dry acetonitrile. 2.14 mL (1.1 equiv) phthaloyl dichloride and 7 mL (3 equiv) Hünig's base were added. The mixture was stirred at room temperature overnight. Acetonitrile was removed; the remaining product was taken up in dichloromethane and washed with basic water (pH=11). The aqueous wash was extracted with dichloromethane 15 mL×3. The organic fractions were combined and dried over sodium sulfate. Solvent was removed to give the crude product, which was then purified by column chromatography. Calculated yield: 1.8 g (34%). Acetonitrile was removed washed with basic water (pH=11) The aqueous wash was extracted with dichloromethane 15 mL×3 dried over sodium sulfate Solvent was removed