3,3-二甲基哌啶-2,6-二酮

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The mixture of 10 g of 2,2-dimethylglutaric acid and 37.5 g of urea was stirred for 8 hours at 160° C. Into the reaction mixture was added water at 100° C., and the mixture was cooled to near room temperature. The mixture was extracted with ethyl acetate three times. The organic layers were washed with a saturated sodium chloride aqueous solution, dried over anhydrous magnesium sulfate and concentrated. The residue was subjected to silica gel column chromatography to obtain 7.6 g of 3,3-dimethylpiperidin-2,6-dione. the mixture was cooled to near room temperature The mixture was extracted with ethyl acetate three times The organic layers were washed with a saturated sodium chloride aqueous solution dried over anhydrous magnesium sulfate concentrated

反应条件: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The mixture of 10 g of 2,2-dimethylglutaric acid and 37.5 g of urea was stirred for 8 hours at 160° C. Into the reaction mixture was added water at 100° C., and the mixture was cooled to near room temperature. The mixture was extracted with ethyl acetate three times. The organic layers were washed with a saturated sodium chloride aqueous solution, dried over anhydrous magnesium sulfate and concentrated. The residue was subjected to silica gel column chromatography to obtain 7.6 g of 3,3-dimethylpiperidin-2,6-dione. the mixture was cooled to near room temperature The mixture was extracted with ethyl acetate three times The organic layers were washed with a saturated sodium chloride aqueous solution dried over anhydrous magnesium sulfate concentrated

反应条件: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The mixture of 10 g of 2,2-dimethylglutaric acid and 37.5 g of urea was stirred for 8 hours at 160° C. Into the reaction mixture was added water at 100° C., and the mixture was cooled to near room temperature. The mixture was extracted with ethyl acetate three times. The organic layers were washed with a saturated sodium chloride aqueous solution, dried over anhydrous magnesium sulfate and concentrated. The residue was subjected to silica gel column chromatography to obtain 7.6 g of 3,3-dimethylpiperidin-2,6-dione. the mixture was cooled to near room temperature The mixture was extracted with ethyl acetate three times The organic layers were washed with a saturated sodium chloride aqueous solution dried over anhydrous magnesium sulfate concentrated

反应条件: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The mixture of 10 g of 2,2-dimethylglutaric acid and 37.5 g of urea was stirred for 8 hours at 160° C. Into the reaction mixture was added water at 100° C., and the mixture was cooled to near room temperature. The mixture was extracted with ethyl acetate three times. The organic layers were washed with a saturated sodium chloride aqueous solution, dried over anhydrous magnesium sulfate and concentrated. The residue was subjected to silica gel column chromatography to obtain 7.6 g of 3,3-dimethylpiperidin-2,6-dione. the mixture was cooled to near room temperature The mixture was extracted with ethyl acetate three times The organic layers were washed with a saturated sodium chloride aqueous solution dried over anhydrous magnesium sulfate concentrated

反应条件: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The mixture of 10 g of 2,2-dimethylglutaric acid and 37.5 g of urea was stirred for 8 hours at 160° C. Into the reaction mixture was added water at 100° C., and the mixture was cooled to near room temperature. The mixture was extracted with ethyl acetate three times. The organic layers were washed with a saturated sodium chloride aqueous solution, dried over anhydrous magnesium sulfate and concentrated. The residue was subjected to silica gel column chromatography to obtain 7.6 g of 3,3-dimethylpiperidin-2,6-dione. the mixture was cooled to near room temperature The mixture was extracted with ethyl acetate three times The organic layers were washed with a saturated sodium chloride aqueous solution dried over anhydrous magnesium sulfate concentrated

反应条件: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The mixture of 10 g of 2,2-dimethylglutaric acid and 37.5 g of urea was stirred for 8 hours at 160° C. Into the reaction mixture was added water at 100° C., and the mixture was cooled to near room temperature. The mixture was extracted with ethyl acetate three times. The organic layers were washed with a saturated sodium chloride aqueous solution, dried over anhydrous magnesium sulfate and concentrated. The residue was subjected to silica gel column chromatography to obtain 7.6 g of 3,3-dimethylpiperidin-2,6-dione. the mixture was cooled to near room temperature The mixture was extracted with ethyl acetate three times The organic layers were washed with a saturated sodium chloride aqueous solution dried over anhydrous magnesium sulfate concentrated

反应条件: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The mixture of 10 g of 2,2-dimethylglutaric acid and 37.5 g of urea was stirred for 8 hours at 160° C. Into the reaction mixture was added water at 100° C., and the mixture was cooled to near room temperature. The mixture was extracted with ethyl acetate three times. The organic layers were washed with a saturated sodium chloride aqueous solution, dried over anhydrous magnesium sulfate and concentrated. The residue was subjected to silica gel column chromatography to obtain 7.6 g of 3,3-dimethylpiperidin-2,6-dione. the mixture was cooled to near room temperature The mixture was extracted with ethyl acetate three times The organic layers were washed with a saturated sodium chloride aqueous solution dried over anhydrous magnesium sulfate concentrated

反应条件: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The mixture of 10 g of 2,2-dimethylglutaric acid and 37.5 g of urea was stirred for 8 hours at 160° C. Into the reaction mixture was added water at 100° C., and the mixture was cooled to near room temperature. The mixture was extracted with ethyl acetate three times. The organic layers were washed with a saturated sodium chloride aqueous solution, dried over anhydrous magnesium sulfate and concentrated. The residue was subjected to silica gel column chromatography to obtain 7.6 g of 3,3-dimethylpiperidin-2,6-dione. the mixture was cooled to near room temperature The mixture was extracted with ethyl acetate three times The organic layers were washed with a saturated sodium chloride aqueous solution dried over anhydrous magnesium sulfate concentrated

反应条件: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The mixture of 10 g of 2,2-dimethylglutaric acid and 37.5 g of urea was stirred for 8 hours at 160° C. Into the reaction mixture was added water at 100° C., and the mixture was cooled to near room temperature. The mixture was extracted with ethyl acetate three times. The organic layers were washed with a saturated sodium chloride aqueous solution, dried over anhydrous magnesium sulfate and concentrated. The residue was subjected to silica gel column chromatography to obtain 7.6 g of 3,3-dimethylpiperidin-2,6-dione. the mixture was cooled to near room temperature The mixture was extracted with ethyl acetate three times The organic layers were washed with a saturated sodium chloride aqueous solution dried over anhydrous magnesium sulfate concentrated