tert-butyl 1,2,2,2-tetrachloroethyl carbonate

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

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: To a solution of 1.33 g (10 mmol) of L-aspartic acid in a dioxane/water (1:1) mixture (30 ml), 4.2 ml (30 mmol) of triethylamine are added, and the mixture is stirred until solution is complete (approximately 10 min). 2.85 g (10 mmol) of tert-butyl 1,2,2,2-tetrachloroethyl carbonate are then added and the mixture is stirred for 6 hours at 20° C. 50 ml of water are then added and the mixture is extracted with 2×20 ml of ethyl acetate. The aqueous phase is acidified (pH 2-3) with NHCl, and then extracted with 3×30 ml of ethyl acetate. The extract is washed with saturated NaCl solution, dried over MgSO4 and evaporated. The product obtained is crystallised in ethyl acetate and petroleum ether. 1.4 g (60% yield) of the expected acid is obtained. ##STR60## (approximately 10 min) the mixture is stirred for 6 hours at 20° C the mixture is extracted with 2×20 ml of ethyl acetate extracted with 3×30 ml of ethyl acetate The extract is washed with saturated NaCl solution dried over MgSO4 evaporated The product obtained is crystallised in ethyl acetate

反应条件: temp:20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 5 g (17.5 mmol) of tert-butyl 1,2,2,2-tetrachloroethyl carbonate dissolved in 10 ml of THF are added at 0° C. to a solution of imidazole (1.2 g; 17.6 mmol) in THF (20 ml) in the presence of 5M aqueous potassium carbonate solution (5 ml). The mixture is stirred for 1 hour at 20° C., and the organic phase is decanted and washed with 10 ml of saturated aqueous NaCl solution. the organic phase is decanted washed with 10 ml of saturated aqueous NaCl solution

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: To a solution of 1.33 g (10 mmol) of L-aspartic acid in a dioxane/water (1:1) mixture (30 ml), 4.2 ml (30 mmol) of triethylamine are added, and the mixture is stirred until solution is complete (approximately 10 min). 2.85 g (10 mmol) of tert-butyl 1,2,2,2-tetrachloroethyl carbonate are then added and the mixture is stirred for 6 hours at 20° C. 50 ml of water are then added and the mixture is extracted with 2×20 ml of ethyl acetate. The aqueous phase is acidified (pH 2-3) with NHCl, and then extracted with 3×30 ml of ethyl acetate. The extract is washed with saturated NaCl solution, dried over MgSO4 and evaporated. The product obtained is crystallised in ethyl acetate and petroleum ether. 1.4 g (60% yield) of the expected acid is obtained. ##STR60## (approximately 10 min) the mixture is stirred for 6 hours at 20° C the mixture is extracted with 2×20 ml of ethyl acetate extracted with 3×30 ml of ethyl acetate The extract is washed with saturated NaCl solution dried over MgSO4 evaporated The product obtained is crystallised in ethyl acetate

反应条件: temp:20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 5 g (17.5 mmol) of tert-butyl 1,2,2,2-tetrachloroethyl carbonate dissolved in 10 ml of THF are added at 0° C. to a solution of imidazole (1.2 g; 17.6 mmol) in THF (20 ml) in the presence of 5M aqueous potassium carbonate solution (5 ml). The mixture is stirred for 1 hour at 20° C., and the organic phase is decanted and washed with 10 ml of saturated aqueous NaCl solution. the organic phase is decanted washed with 10 ml of saturated aqueous NaCl solution

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

实验步骤: To a solution of 1.33 g (10 mmol) of L-aspartic acid in a dioxane/water (1:1) mixture (30 ml), 4.2 ml (30 mmol) of triethylamine are added, and the mixture is stirred until solution is complete (approximately 10 min). 2.85 g (10 mmol) of tert-butyl 1,2,2,2-tetrachloroethyl carbonate are then added and the mixture is stirred for 6 hours at 20° C. 50 ml of water are then added and the mixture is extracted with 2×20 ml of ethyl acetate. The aqueous phase is acidified (pH 2-3) with NHCl, and then extracted with 3×30 ml of ethyl acetate. The extract is washed with saturated NaCl solution, dried over MgSO4 and evaporated. The product obtained is crystallised in ethyl acetate and petroleum ether. 1.4 g (60% yield) of the expected acid is obtained. ##STR60## (approximately 10 min) the mixture is stirred for 6 hours at 20° C the mixture is extracted with 2×20 ml of ethyl acetate extracted with 3×30 ml of ethyl acetate The extract is washed with saturated NaCl solution dried over MgSO4 evaporated The product obtained is crystallised in ethyl acetate

反应条件: temp:20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 5 g (17.5 mmol) of tert-butyl 1,2,2,2-tetrachloroethyl carbonate dissolved in 10 ml of THF are added at 0° C. to a solution of imidazole (1.2 g; 17.6 mmol) in THF (20 ml) in the presence of 5M aqueous potassium carbonate solution (5 ml). The mixture is stirred for 1 hour at 20° C., and the organic phase is decanted and washed with 10 ml of saturated aqueous NaCl solution. the organic phase is decanted washed with 10 ml of saturated aqueous NaCl solution