1-aminoimidazolidine-2,4-dione

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 1.15 g. (0.01 mol.) of 1-amino-2,4-dioxoimidazolidine are dissolved in 50 ml. of dioxane while heating. The solution is permitted to cool to room temperature while stirring, wherein a portion of the 1-amino-2,4-dioxoimidazolidine crystallizes out. 2.05 g. (0.01 mol.) of α-isocyanatobenzeneacetic acid, ethyl ester are added and the reation mixture is stirred overnight at room temperature. On the next day the mixture is concentrated and the residue is triturated with ether. 3.0 g. of α-[[[(2,4-dioxo-1-imidazolidinyl)amino]-carbonyl] amino]benzeneacetic acid, ethyl ester are obtained, m.p. 148°-151°. wherein a portion of the 1-amino-2,4-dioxoimidazolidine crystallizes out the reation mixture is stirred overnight at room temperature On the next day the mixture is concentrated the residue is triturated with ether

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 1.15 g. (0.01 mol.) of 1-amino-2,4-dioxoimidazolidine are dissolved in 50 ml. of dioxane while heating. The solution is permitted to cool to room temperature while stirring, wherein a portion of the 1-amino-2,4-dioxoimidazolidine crystallizes out. 2.05 g. (0.01 mol.) of α-isocyanatobenzeneacetic acid, ethyl ester are added and the reation mixture is stirred overnight at room temperature. On the next day the mixture is concentrated and the residue is triturated with ether. 3.0 g. of α-[[[(2,4-dioxo-1-imidazolidinyl)amino]-carbonyl] amino]benzeneacetic acid, ethyl ester are obtained, m.p. 148°-151°. wherein a portion of the 1-amino-2,4-dioxoimidazolidine crystallizes out the reation mixture is stirred overnight at room temperature On the next day the mixture is concentrated the residue is triturated with ether

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 11.5 g. (0.1 mol.) of 1-amino-2,4-dioxoimidazolidine are thoroughly stirred into 150 ml. of absolute tetrahydrofuran. A solution of 15 g. (0.15 mol.) of phosgene in 25 ml. of absolute tetrahydrofuran is added dropwise at 0°-5° over 20 minutes. The mixture is then stirred for 3 hours at room temperature. An almost clear solution results. This is filtered and the solvent is evaporated in vacuum. The oily residue crystallizes on trituration with petroleum ether to obtain 1-(chlorocarbonylamino)-2,4-dioxoimidazolidine, yield 17.2 g., m.p. 126° (dec.). An almost clear solution results This is filtered the solvent is evaporated in vacuum The oily residue crystallizes on trituration with petroleum ether

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 11.5 g. (0.1 mol.) of 1-amino-2,4-dioxoimidazolidine are thoroughly stirred into 150 ml. of absolute tetrahydrofuran. A solution of 15 g. (0.15 mol.) of phosgene in 25 ml. of absolute tetrahydrofuran is added dropwise at 0°-5° over 20 minutes. The mixture is then stirred for 3 hours at room temperature. An almost clear solution results. This is filtered and the solvent is evaporated in vacuum. The oily residue crystallizes on trituration with petroleum ether to obtain 1-(chlorocarbonylamino)-2,4-dioxoimidazolidine, yield 17.2 g., m.p. 126° (dec.). An almost clear solution results This is filtered the solvent is evaporated in vacuum The oily residue crystallizes on trituration with petroleum ether

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 11.5 g. (0.1 mol.) of 1-amino-2,4-dioxoimidazolidine are thoroughly stirred into 150 ml. of absolute tetrahydrofuran. A solution of 15 g. (0.15 mol.) of phosgene in 25 ml. of absolute tetrahydrofuran is added dropwise at 0°-5° over 20 minutes. The mixture is then stirred for 3 hours at room temperature. An almost clear solution results. This is filtered and the solvent is evaporated in vacuum. The oily residue crystallizes on trituration with petroleum ether to obtain 1-(chlorocarbonylamino)-2,4-dioxoimidazolidine, yield 17.2 g., m.p. 126° (dec.). An almost clear solution results This is filtered the solvent is evaporated in vacuum The oily residue crystallizes on trituration with petroleum ether