六氢-1H-1,4-二氮杂卓-1-乙酸乙酯

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

实验步骤: Sodium carbonate (1.27 g) was added to a solution of homopiperazine (5.99 g; 5 eq.) and ethyl bromoacetate (2.0 g; 1 eq.) in CH3CN (120 mL). The reaction was stirred at room temperature for 6 h. The reaction mixture was filtered thru a celite pad. The filtrate was concentrated. The remaining residual was dissolved in CHCl3 (120 mL), washed by H2O (50 mL×3) and brine (50 mL×1), dried by Na2SO4 and concentrated to give [1,4]diazepan-1-yl-acetic acid ethyl ester (1.794 g), which was carried on for the next step without further purification. 1H NMR (300 MHz, CDCl3) δ 4.15 (m, 2H), 3.39 (s, 2H), 2.91 (m, 4H), 2.81 (m, 4H), 1.76 (m, 3H), 1.25 (m, 3H). The reaction mixture was filtered The filtrate was concentrated The remaining residual was dissolved in CHCl3 (120 mL) washed by H2O (50 mL×3) and brine (50 mL×1) dried by Na2SO4 concentrated

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

实验步骤: Sodium carbonate (1.27 g) was added to a solution of homopiperazine (5.99 g; 5 eq.) and ethyl bromoacetate (2.0 g; 1 eq.) in CH3CN (120 mL). The reaction was stirred at room temperature for 6 h. The reaction mixture was filtered thru a celite pad. The filtrate was concentrated. The remaining residual was dissolved in CHCl3 (120 mL), washed by H2O (50 mL×3) and brine (50 mL×1), dried by Na2SO4 and concentrated to give [1,4]diazepan-1-yl-acetic acid ethyl ester (1.794 g), which was carried on for the next step without further purification. 1H NMR (300 MHz, CDCl3) δ 4.15 (m, 2H), 3.39 (s, 2H), 2.91 (m, 4H), 2.81 (m, 4H), 1.76 (m, 3H), 1.25 (m, 3H). The reaction mixture was filtered The filtrate was concentrated The remaining residual was dissolved in CHCl3 (120 mL) washed by H2O (50 mL×3) and brine (50 mL×1) dried by Na2SO4 concentrated

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

实验步骤: Sodium carbonate (1.27 g) was added to a solution of homopiperazine (5.99 g; 5 eq.) and ethyl bromoacetate (2.0 g; 1 eq.) in CH3CN (120 mL). The reaction was stirred at room temperature for 6 h. The reaction mixture was filtered thru a celite pad. The filtrate was concentrated. The remaining residual was dissolved in CHCl3 (120 mL), washed by H2O (50 mL×3) and brine (50 mL×1), dried by Na2SO4 and concentrated to give [1,4]diazepan-1-yl-acetic acid ethyl ester (1.794 g), which was carried on for the next step without further purification. 1H NMR (300 MHz, CDCl3) δ 4.15 (m, 2H), 3.39 (s, 2H), 2.91 (m, 4H), 2.81 (m, 4H), 1.76 (m, 3H), 1.25 (m, 3H). The reaction mixture was filtered The filtrate was concentrated The remaining residual was dissolved in CHCl3 (120 mL) washed by H2O (50 mL×3) and brine (50 mL×1) dried by Na2SO4 concentrated

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

实验步骤: In a manner analogous to the method described in examples 8, (4S,5R)-2-(6-tert-butyl-4-ethoxy-pyridin-3-yl)-4,5-bis-(4-chloro-phenyl)-4,5-dimethyl-4,5-dihydro-imidazole-1-carbonyl chloride (example 51) was coupled with homopiperazine-acetic acid ethyl ester to give 2-{4-[(4S,5R)-2-(6-tert-butyl-4-ethoxy-pyridin-3-yl)-4,5-bis-(4-chloro-phenyl)-4,5-dimethyl-4,5-dihydro-imidazole-1-carbonyl]-[1,4]diazepan-1-yl}-acetic acid ethyl ester. The ester was hydrolyzed, then the corresponding acid was treated with amonium chloride to give the title compound. HR-MS (ES, m/z) calculated for C36H45Cl2N6O3 [(M+H)+] 679.2925, observed 679.2927.

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

实验步骤: Ethyl bromoacetate (3.7 g, 18.4 mmol, Aldrich) was added in portions to a solution of homopiperazine (2.76 g, 27.6 mmol, Avocado) in N,N-dimethylformamide (15 mL) at room temperature over 1.5 h. The mixture was then stirred for additional 4 h followed by an aqueous workup. The crude was purified by column flash chromatography to give homopiperazine-acetic acid ethyl ester (471 mg). The crude was purified by column flash chromatography