(5,5-二甲基-1,3-二恶烷-2-基)甲醇

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

实验步骤: The (5,5-dimethyl-1,3-dioxan-2-yl)methanol (2 g, 13.7 mmol) obtained in the step (1b) was mixed with sodium hydride in oil (822 mg, 20.6 mmol as the content was regarded as 60%) and dimethylsulfoxide (20 ml). The mixture was stirred at room temperature for 30 minutes. To the reaction mixture, 4-chloro-2,3-dimethylpyridine1-oxide (2.16 g, 13.7 mmol) was added and stirred at 50° C. overnight, and further allowed to stand still for one day at room temperature. After dimethylsulfoxide was distilled off, methanol and NH silica gel were added to the residue and then methanol was distilled off. The mixture of the reaction mixture and NH silica gel was purified by silica gel column chromatography (NH silica gel: 200 g, elution solvent: ethyl acetate/heptane=1/1 to 4/1→methanol/ethyl acetate=1/9) to obtain the title compound (3.1 g, yield: 84.6%) as a light yellow oil. stirred at 50° C. overnight to stand still for one day at room temperature After dimethylsulfoxide was distilled off methanol and NH silica gel were added to the residue methanol was distilled off The mixture of the reaction mixture and NH silica gel was purified by silica gel column chromatography (NH silica gel: 200 g, elution solvent: ethyl acetate/heptane=1/1 to 4/1→methanol/ethyl acetate=1/9)

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

实验步骤: The 2-((benzyloxy)methyl)-5,5-dimethyl-1,3-dioxane (7.6 g, 32.2 mmol) obtained by the step (1a) was mixed with 20% palladium hydroxide (700 mg) and ethyl acetate (70 ml). The mixture was stirred in a hydrogen atmosphere overnight. The reaction mixture was allowed to stand for further 5 days in the same hydrogen atmosphere. The reaction vessel was purged with nitrogen, the catalyst was filtered off, and the solvent was distilled off to obtain the title compound (4 g, yield: 85%) as a white solid. The reaction vessel was purged with nitrogen the catalyst was filtered off the solvent was distilled off

反应条件: temp:0.00; pressure:0.00; stir:

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

实验步骤: The (5,5-dimethyl-1,3-dioxan-2-yl)methanol (2 g, 13.7 mmol) obtained in the step (1b) was mixed with sodium hydride in oil (822 mg, 20.6 mmol as the content was regarded as 60%) and dimethylsulfoxide (20 ml). The mixture was stirred at room temperature for 30 minutes. To the reaction mixture, 4-chloro-2,3-dimethylpyridine1-oxide (2.16 g, 13.7 mmol) was added and stirred at 50° C. overnight, and further allowed to stand still for one day at room temperature. After dimethylsulfoxide was distilled off, methanol and NH silica gel were added to the residue and then methanol was distilled off. The mixture of the reaction mixture and NH silica gel was purified by silica gel column chromatography (NH silica gel: 200 g, elution solvent: ethyl acetate/heptane=1/1 to 4/1→methanol/ethyl acetate=1/9) to obtain the title compound (3.1 g, yield: 84.6%) as a light yellow oil. stirred at 50° C. overnight to stand still for one day at room temperature After dimethylsulfoxide was distilled off methanol and NH silica gel were added to the residue methanol was distilled off The mixture of the reaction mixture and NH silica gel was purified by silica gel column chromatography (NH silica gel: 200 g, elution solvent: ethyl acetate/heptane=1/1 to 4/1→methanol/ethyl acetate=1/9)

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

实验步骤: The 2-((benzyloxy)methyl)-5,5-dimethyl-1,3-dioxane (7.6 g, 32.2 mmol) obtained by the step (1a) was mixed with 20% palladium hydroxide (700 mg) and ethyl acetate (70 ml). The mixture was stirred in a hydrogen atmosphere overnight. The reaction mixture was allowed to stand for further 5 days in the same hydrogen atmosphere. The reaction vessel was purged with nitrogen, the catalyst was filtered off, and the solvent was distilled off to obtain the title compound (4 g, yield: 85%) as a white solid. The reaction vessel was purged with nitrogen the catalyst was filtered off the solvent was distilled off

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

实验步骤: The (5,5-dimethyl-1,3-dioxan-2-yl)methanol (2 g, 13.7 mmol) obtained in the step (1b) was mixed with sodium hydride in oil (822 mg, 20.6 mmol as the content was regarded as 60%) and dimethylsulfoxide (20 ml). The mixture was stirred at room temperature for 30 minutes. To the reaction mixture, 4-chloro-2,3-dimethylpyridine1-oxide (2.16 g, 13.7 mmol) was added and stirred at 50° C. overnight, and further allowed to stand still for one day at room temperature. After dimethylsulfoxide was distilled off, methanol and NH silica gel were added to the residue and then methanol was distilled off. The mixture of the reaction mixture and NH silica gel was purified by silica gel column chromatography (NH silica gel: 200 g, elution solvent: ethyl acetate/heptane=1/1 to 4/1→methanol/ethyl acetate=1/9) to obtain the title compound (3.1 g, yield: 84.6%) as a light yellow oil. stirred at 50° C. overnight to stand still for one day at room temperature After dimethylsulfoxide was distilled off methanol and NH silica gel were added to the residue methanol was distilled off The mixture of the reaction mixture and NH silica gel was purified by silica gel column chromatography (NH silica gel: 200 g, elution solvent: ethyl acetate/heptane=1/1 to 4/1→methanol/ethyl acetate=1/9)

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

实验步骤: The 2-((benzyloxy)methyl)-5,5-dimethyl-1,3-dioxane (7.6 g, 32.2 mmol) obtained by the step (1a) was mixed with 20% palladium hydroxide (700 mg) and ethyl acetate (70 ml). The mixture was stirred in a hydrogen atmosphere overnight. The reaction mixture was allowed to stand for further 5 days in the same hydrogen atmosphere. The reaction vessel was purged with nitrogen, the catalyst was filtered off, and the solvent was distilled off to obtain the title compound (4 g, yield: 85%) as a white solid. The reaction vessel was purged with nitrogen the catalyst was filtered off the solvent was distilled off

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

实验步骤: The (5,5-dimethyl-1,3-dioxan-2-yl)methanol (2 g, 13.7 mmol) obtained in the step (1b) was mixed with sodium hydride in oil (822 mg, 20.6 mmol as the content was regarded as 60%) and dimethylsulfoxide (20 ml). The mixture was stirred at room temperature for 30 minutes. To the reaction mixture, 4-chloro-2,3-dimethylpyridine 1-oxide (2.16 g, 13.7 mmol) was added and stirred at 50° C. overnight, and further allowed to stand still for one day at room temperature. After dimethylsulfoxide was distilled off, methanol and NH silica gel were added to the residue and then methanol was distilled off. The mixture of the reaction mixture and NH silica gel was purified by silica gel column chromatography (NH silica gel: 200 g, elution solvent: ethyl acetate/heptane=1/1 to 4/1→methanol/ethyl acetate=1/9) to obtain the title compound (3.1 g, yield: 84.6%) as a light yellow oil. stirred at 50° C. overnight to stand still for one day at room temperature After dimethylsulfoxide was distilled off methanol and NH silica gel were added to the residue methanol was distilled off The mixture of the reaction mixture and NH silica gel was purified by silica gel column chromatography (NH silica gel: 200 g, elution solvent: ethyl acetate/heptane=1/1 to 4/1→methanol/ethyl acetate=1/9)

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

实验步骤: The 2-((benzyloxy)methyl)-5,5-dimethyl-1,3-dioxane (7.6 g, 32.2 mmol) obtained by the step (1a) was mixed with 20% palladium hydroxide (700 mg) and ethyl acetate (70 ml). The mixture was stirred in a hydrogen atmosphere overnight. The reaction mixture was allowed to stand for further 5 days in the same hydrogen atmosphere. The reaction vessel was purged with nitrogen, the catalyst was filtered off, and the solvent was distilled off to obtain the title compound (4 g, yield: 85%) as a white solid. The reaction vessel was purged with nitrogen the catalyst was filtered off the solvent was distilled off