4,5-dibromocyclohexene

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The compound obtained in Step (9) (80.5 g, 338 mmol), water (500 ml), acetone (250 ml), and N-methylmorpholine (45.5 g, 389 mmol) were placed in a reaction vessel, and was stirred. OsO4 (1 g) was added to the mixture, and was vigorously stirred for 24 hours. After the completion of the reaction, a suspension of NaHSO3 (50 g) and Florisil (250 g) in water (100 ml) was added to the reaction solution, and was stirred for 10 minutes. After that, insoluble matter was removed by celite filtration, and 5% HCl was added to the filtrate until the pH of the filtrate became 3. Upon confirming that the pH had reached 3, and acetone was removed under reduced pressure. Organic matter was extracted from the remainder with ethyl acetate, dried over sodium sulfate, and concentrated under reduced pressure. The precipitated crystals were filtrated, and was then recrystallized with methylene chloride, whereby 4,5-dibromo-1,2-cyclohexanediol was obtained (64.6 g, 70%). was vigorously stirred for 24 hours After the completion of the reaction was added to the reaction solution was stirred for 10 minutes After that, insoluble matter was removed by celite filtration, and 5% HCl was added to the filtrate until the pH of the filtrate was removed under reduced pressure Organic matter was extracted from the remainder with ethyl acetate dried over sodium sulfate concentrated under reduced pressure The precipitated crystals were filtrated was then recrystallized with methylene chloride

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The compound obtained in Step (9) (80.5 g, 338 mmol), water (500 ml), acetone (250 ml), and N-methylmorpholine (45.5 g, 389 mmol) were placed in a reaction vessel, and was stirred. OsO4 (1 g) was added to the mixture, and was vigorously stirred for 24 hours. After the completion of the reaction, a suspension of NaHSO3 (50 g) and Florisil (250 g) in water (100 ml) was added to the reaction solution, and was stirred for 10 minutes. After that, insoluble matter was removed by celite filtration, and 5% HCl was added to the filtrate until the pH of the filtrate became 3. Upon confirming that the pH had reached 3, and acetone was removed under reduced pressure. Organic matter was extracted from the remainder with ethyl acetate, dried over sodium sulfate, and concentrated under reduced pressure. The precipitated crystals were filtrated, and was then recrystallized with methylene chloride, whereby 4,5-dibromo-1,2-cyclohexanediol was obtained (64.6 g, 70%). was vigorously stirred for 24 hours After the completion of the reaction was added to the reaction solution was stirred for 10 minutes After that, insoluble matter was removed by celite filtration, and 5% HCl was added to the filtrate until the pH of the filtrate was removed under reduced pressure Organic matter was extracted from the remainder with ethyl acetate dried over sodium sulfate concentrated under reduced pressure The precipitated crystals were filtrated was then recrystallized with methylene chloride

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The compound obtained in Step (9) (80.5 g, 338 mmol), water (500 ml), acetone (250 ml), and N-methylmorpholine (45.5 g, 389 mmol) were placed in a reaction vessel, and was stirred. OsO4 (1 g) was added to the mixture, and was vigorously stirred for 24 hours. After the completion of the reaction, a suspension of NaHSO3 (50 g) and Florisil (250 g) in water (100 ml) was added to the reaction solution, and was stirred for 10 minutes. After that, insoluble matter was removed by celite filtration, and 5% HCl was added to the filtrate until the pH of the filtrate became 3. Upon confirming that the pH had reached 3, and acetone was removed under reduced pressure. Organic matter was extracted from the remainder with ethyl acetate, dried over sodium sulfate, and concentrated under reduced pressure. The precipitated crystals were filtrated, and was then recrystallized with methylene chloride, whereby 4,5-dibromo-1,2-cyclohexanediol was obtained (64.6 g, 70%). was vigorously stirred for 24 hours After the completion of the reaction was added to the reaction solution was stirred for 10 minutes After that, insoluble matter was removed by celite filtration, and 5% HCl was added to the filtrate until the pH of the filtrate was removed under reduced pressure Organic matter was extracted from the remainder with ethyl acetate dried over sodium sulfate concentrated under reduced pressure The precipitated crystals were filtrated was then recrystallized with methylene chloride

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The compound obtained in Step (9) (80.5 g, 338 mmol), water (500 ml), acetone (250 ml), and N-methylmorpholine (45.5 g, 389 mmol) were placed in a reaction vessel, and was stirred. OsO4 (1 g) was added to the mixture, and was vigorously stirred for 24 hours. After the completion of the reaction, a suspension of NaHSO3 (50 g) and Florisil (250 g) in water (100 ml) was added to the reaction solution, and was stirred for 10 minutes. After that, insoluble matter was removed by celite filtration, and 5% HCl was added to the filtrate until the pH of the filtrate became 3. Upon confirming that the pH had reached 3, and acetone was removed under reduced pressure. Organic matter was extracted from the remainder with ethyl acetate, dried over sodium sulfate, and concentrated under reduced pressure. The precipitated crystals were filtrated, and was then recrystallized with methylene chloride, whereby 4,5-dibromo-1,2-cyclohexanediol was obtained (64.6 g, 70%). was vigorously stirred for 24 hours After the completion of the reaction was added to the reaction solution was stirred for 10 minutes After that, insoluble matter was removed by celite filtration, and 5% HCl was added to the filtrate until the pH of the filtrate was removed under reduced pressure Organic matter was extracted from the remainder with ethyl acetate dried over sodium sulfate concentrated under reduced pressure The precipitated crystals were filtrated was then recrystallized with methylene chloride

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The compound obtained in Step (9) (80.5 g, 338 mmol), water (500 ml), acetone (250 ml), and N-methylmorpholine (45.5 g, 389 mmol) were placed in a reaction vessel, and was stirred. OsO4 (1 g) was added to the mixture, and was vigorously stirred for 24 hours. After the completion of the reaction, a suspension of NaHSO3 (50 g) and Florisil (250 g) in water (100 ml) was added to the reaction solution, and was stirred for 10 minutes. After that, insoluble matter was removed by celite filtration, and 5% HCl was added to the filtrate until the pH of the filtrate became 3. Upon confirming that the pH had reached 3, and acetone was removed under reduced pressure. Organic matter was extracted from the remainder with ethyl acetate, dried over sodium sulfate, and concentrated under reduced pressure. The precipitated crystals were filtrated, and was then recrystallized with methylene chloride, whereby 4,5-dibromo-1,2-cyclohexanediol was obtained (64.6 g, 70%). was vigorously stirred for 24 hours After the completion of the reaction was added to the reaction solution was stirred for 10 minutes After that, insoluble matter was removed by celite filtration, and 5% HCl was added to the filtrate until the pH of the filtrate was removed under reduced pressure Organic matter was extracted from the remainder with ethyl acetate dried over sodium sulfate concentrated under reduced pressure The precipitated crystals were filtrated was then recrystallized with methylene chloride