(5S)-5-[[tert-butyl(diphenyl)silyl]oxymethyl]pyrrolidin-2-one

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

実験手順: To a solution of (S)-5-(hydroxymethyl)pyrrolidin-2-one (10 g, 87 mmol) in CH2Cl2 (50 mL) was added tert-butylchlorodiphenylsilane (25.6 g, 93 mmol), Et3N (12.1 mL, 87 mmol) and DMAP (1.06 g, 8.7 mmol). The mixture was stirred at room temperature until the starting pyrrolidinone was completely consumed and then diluted with CH2Cl2 (50 mL) and washed with water (50 mL). The organic layer was dried (Na2SO4), filtered, evaporated in vacuo and the crude material was submitted to flash chromatography (silica gel; 30 to 100% of EtOAc/hexanes) to afford (S)-5-((tert-butyldiphenylsilyloxy)methyl)pyrrolidin-2-one (22.7 g, 74% yield) as a colorless oil. LC-MS (M+H)+=354.58. 1H NMR (400 MHz, DMSO-d6) δ ppm 7.69 (br s, 1H), 7.64-7.61 (m, 4H), 7.50-7.42 (m, 6H), 3.67-3.62 (m, 1H), 3.58-3.51 (m, 2H), 2.24-2.04 (m, 3H), 1.87-1.81 (m, 1H), 1.00 (s, 9H). was completely consumed diluted with CH2Cl2 (50 mL) washed with water (50 mL) The organic layer was dried (Na2SO4) filtered evaporated in vacuo

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

実験手順: To a solution of (S)-5-(hydroxymethyl)pyrrolidin-2-one (10 g, 87 mmol) in CH2Cl2 (50 mL) was added tert-butylchlorodiphenylsilane (25.6 g, 93 mmol), Et3N (12.1 mL, 87 mmol) and DMAP (1.06 g, 8.7 mmol). The mixture was stirred at room temperature until the starting pyrrolidinone was completely consumed and then diluted with CH2Cl2 (50 mL) and washed with water (50 mL). The organic layer was dried (Na2SO4), filtered, evaporated in vacuo and the crude material was submitted to flash chromatography (silica gel; 30 to 100% of EtOAc/hexanes) to afford (S)-5-((tert-butyldiphenylsilyloxy)methyl)pyrrolidin-2-one (22.7 g, 74% yield) as a colorless oil. LC/MS (M+H)+=354.58. 1H NMR (400 MHz, DMSO-d6) δ ppm 7.69 (br s, 1H), 7.64-7.61 (m, 4H), 7.50-7.42 (m, 6H), 3.67-3.62 (m, 1H), 3.58-3.51 (m, 2H), 2.24-2.04 (m, 3H), 1.87-1.81 (m, 1H), 1.00 (s, 9H). was completely consumed diluted with CH2Cl2 (50 mL) washed with water (50 mL) The organic layer was dried (Na2SO4) filtered evaporated in vacuo

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

実験手順: To a solution of (S)-5-(hydroxymethyl)pyrrolidin-2-one (10 g, 87 mmol) in CH2Cl2 (50 mL) was added tert-butylchlorodiphenylsilane (25.6 g, 93 mmol), Et3N (12.1 mL, 87 mmol) and DMAP (1.06 g, 8.7 mmol). The mixture was stirred at room temperature until the starting pyrrolidinone was completely consumed and then diluted with CH2Cl2 (50 mL) and washed with water (50 mL). The organic layer was dried (Na2SO4), filtered, evaporated in vacuo and the crude material was submitted to flash chromatography (silica gel; 30 to 100% of EtOAc/hexanes) to afford (S)-5-((tert-butyldiphenylsilyloxy)methyl)pyrrolidin-2-one (22.7 g, 74% yield) as a colorless oil. LC-MS (M+H)+=354.58. 1H NMR (400 MHz, DMSO-d6) δ ppm 7.69 (br s, 1H), 7.64-7.61 (m, 4H), 7.50-7.42 (m, 6H), 3.67-3.62 (m, 1H), 3.58-3.51 (m, 2H), 2.24-2.04 (m, 3H), 1.87-1.81 (m, 1H), 1.00 (s, 9H). was completely consumed diluted with CH2Cl2 (50 mL) washed with water (50 mL) The organic layer was dried (Na2SO4) filtered evaporated in vacuo