2,2,4,4-tetramethylpentanedioic acid

Conditions: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The mixture of 2.6 g of tetramethylglutaric acid and 8.3 g of urea was stirred for 10 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 2.3 g of 3,3,5,5-tetramethylpiperidin-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

Conditions: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The mixture of 2.6 g of tetramethylglutaric acid and 8.3 g of urea was stirred for 10 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 2.3 g of 3,3,5,5-tetramethylpiperidin-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

Conditions: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The mixture of 2.6 g of tetramethylglutaric acid and 8.3 g of urea was stirred for 10 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 2.3 g of 3,3,5,5-tetramethylpiperidin-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

Conditions: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The mixture of 2.6 g of tetramethylglutaric acid and 8.3 g of urea was stirred for 10 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 2.3 g of 3,3,5,5-tetramethylpiperidin-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

Conditions: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The mixture of 2.6 g of tetramethylglutaric acid and 8.3 g of urea was stirred for 10 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 2.3 g of 3,3,5,5-tetramethylpiperidin-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

Conditions: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The mixture of 2.6 g of tetramethylglutaric acid and 8.3 g of urea was stirred for 10 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 2.3 g of 3,3,5,5-tetramethylpiperidin-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

Conditions: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The mixture of 2.6 g of tetramethylglutaric acid and 8.3 g of urea was stirred for 10 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 2.3 g of 3,3,5,5-tetramethylpiperidin-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

Conditions: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The mixture of 2.6 g of tetramethylglutaric acid and 8.3 g of urea was stirred for 10 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 2.3 g of 3,3,5,5-tetramethylpiperidin-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

Conditions: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The mixture of 2.6 g of tetramethylglutaric acid and 8.3 g of urea was stirred for 10 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 2.3 g of 3,3,5,5-tetramethylpiperidin-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

Conditions: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The mixture of 2.6 g of tetramethylglutaric acid and 8.3 g of urea was stirred for 10 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 2.3 g of 3,3,5,5-tetramethylpiperidin-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

Conditions: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The mixture of 2.6 g of tetramethylglutaric acid and 8.3 g of urea was stirred for 10 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 2.3 g of 3,3,5,5-tetramethylpiperidin-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

Conditions: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The mixture of 2.6 g of tetramethylglutaric acid and 8.3 g of urea was stirred for 10 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 2.3 g of 3,3,5,5-tetramethylpiperidin-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