benzyl N-(1-hydroxy-2-methylpropan-2-yl)carbamate

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: To a dichloromethane solution containing 2.52 g (0.011 mol) 2-carbobenzoxyamino-2-methyl-1-propanol and 1.17 g (0.015 mol) acetyl chloride was added dropwise with stirring 1.11 g (0.011 mol) triethylamine. The reaction was stirred at ambient temperature overnight and the dichloromethane was removed under reduced pressure. The triethylamine hydrochloride residue was triturated in anhydrous ether. Following filtration, the ether was removed under reduced pressure to afford 2.38 g (0.009 mol), 82%, crude 2-carbobenzoxyamino-2-methyl-1-propyl acetate as a pale yellow liquid, pmr (CDCl3) δ 7.2 (s, 5H), 5.4 (bs, 1H), 5.0 (s, 2H), 2.0 (s, 3H) and 1.2 (s, 6H) ppm. was added dropwise the dichloromethane was removed under reduced pressure The triethylamine hydrochloride residue was triturated in anhydrous ether filtration the ether was removed under reduced pressure

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

実験手順: To a dichloromethane solution containing 2.52 g (0.011 mol) 2-carbobenzoxyamino-2-methyl-1-propanol and 1.17 g (0.015 mol) acetyl chloride was added dropwise with stirring 1.11 g (0.011 mol) triethylamine. The reaction was stirred at ambient temperature overnight and the dichloromethane was removed under reduced pressure. The triethylamine hydrochloride residue was triturated in anhydrous ether. Following filtration, the ether was removed under reduced pressure to afford 2.38 g (0.009 mol), 82%, crude 2-carbobenzoxyamino-2-methyl-1-propyl acetate as a pale yellow liquid, pmr (CDCl3) δ 7.2 (s, 5H), 5.4 (bs, 1H), 5.0 (s, 2H), 2.0 (s, 3H) and 1.2 (s, 6H) ppm. was added dropwise the dichloromethane was removed under reduced pressure The triethylamine hydrochloride residue was triturated in anhydrous ether filtration the ether was removed under reduced pressure

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

実験手順: To a dichloromethane solution containing 2.52 g (0.011 mol) 2-carbobenzoxyamino-2-methyl-1-propanol and 1.17 g (0.015 mol) acetyl chloride was added dropwise with stirring 1.11 g (0.011 mol) triethylamine. The reaction was stirred at ambient temperature overnight and the dichloromethane was removed under reduced pressure. The triethylamine hydrochloride residue was triturated in anhydrous ether. Following filtration, the ether was removed under reduced pressure to afford 2.38 g (0.009 mol), 82%, crude 2-carbobenzoxyamino-2-methyl-1-propyl acetate as a pale yellow liquid, pmr (CDCl3) δ 7.2 (s, 5H), 5.4 (bs, 1H), 5.0 (s, 2H), 2.0 (s, 3H) and 1.2 (s, 6H) ppm. was added dropwise the dichloromethane was removed under reduced pressure The triethylamine hydrochloride residue was triturated in anhydrous ether filtration the ether was removed under reduced pressure

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

実験手順: To a dichloromethane solution containing 2.52 g (0.011 mol) 2-carbobenzoxyamino-2-methyl-1-propanol and 1.17 g (0.015 mol) acetyl chloride was added dropwise with stirring 1.11 g (0.011 mol) triethylamine. The reaction was stirred at ambient temperature overnight and the dichloromethane was removed under reduced pressure. The triethylamine hydrochloride residue was triturated in anhydrous ether. Following filtration, the ether was removed under reduced pressure to afford 2.38 g (0.009 mol), 82%, crude 2-carbobenzoxyamino-2-methyl-1-propyl acetate as a pale yellow liquid, pmr (CDCl3) δ 7.2 (s, 5H), 5.4 (bs, 1H), 5.0 (s, 2H), 2.0 (s, 3H) and 1.2 (s, 6H) ppm. was added dropwise the dichloromethane was removed under reduced pressure The triethylamine hydrochloride residue was triturated in anhydrous ether filtration the ether was removed under reduced pressure

反応条件: temp:-45.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: The product of Example 95A (0.80 g, 3.8 mmol), di-tert-butyl diethylphosphoramidite (1.07 mL, 3.8 mmol), and 1-H-tetrazole (0.63 g, 8.99 mmol) in THF (35 mL) were reacted at room temperature for 12 hours. The reaction was diluted with dichloromethane (35 mL) and cooled to −45° C., and treated with mCPBA (0.90 g, 4.0 mmol) for 0.5 hours then diluted with ethyl acetate (100 mL). The organics were washed with 10% Na2CO3 (2×), brine, dried over MgSO4, and concentrated. The residue was purified by chromatography on silica gel, eluting with a gradient of ethyl acetate in dichloromethane (0-25%) to give the title compound as a colorless oil (0.926 g, 62%). The organics were washed with 10% Na2CO3 (2×), brine dried over MgSO4 concentrated The residue was purified by chromatography on silica gel eluting with a gradient of ethyl acetate in dichloromethane (0-25%)

反応条件: temp:-45.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: The product of Example 95A (0.80 g, 3.8 mmol), di-tert-butyl diethylphosphoramidite (1.07 mL, 3.8 mmol), and 1-H-tetrazole (0.63 g, 8.99 mmol) in THF (35 mL) were reacted at room temperature for 12 hours. The reaction was diluted with dichloromethane (35 mL) and cooled to −45° C., and treated with mCPBA (0.90 g, 4.0 mmol) for 0.5 hours then diluted with ethyl acetate (100 mL). The organics were washed with 10% Na2CO3 (2×), brine, dried over MgSO4, and concentrated. The residue was purified by chromatography on silica gel, eluting with a gradient of ethyl acetate in dichloromethane (0-25%) to give the title compound as a colorless oil (0.926 g, 62%). The organics were washed with 10% Na2CO3 (2×), brine dried over MgSO4 concentrated The residue was purified by chromatography on silica gel eluting with a gradient of ethyl acetate in dichloromethane (0-25%)

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

実験手順: A solution of 2-amino-2-methylpropan-1-ol (1.0 g, 11.2 mmol), triethylamine (1.7 mL, 12.2 mmol) and N-(benzyloxycarbonyloxy)-succinimide (3.1 g, 12.4 mmol) in THF (100 mL) at 0° C. were reacted for 0.5 hours then at room temperature for an additional hour. The reaction was concentrated and extracted with ethyl acetate (100 mL). The organic extract was washed sequentially with water, brine, dried over MgSO4, and concentrated in vacuo. The residue was purified by chromatography on silica gel, eluting with a gradient of ethyl acetate in dichloromethane (0-20%) to give the title compound as a colorless oil (2.5 g, quantitative). at room temperature for an additional hour The reaction was concentrated extracted with ethyl acetate (100 mL) The organic extract was washed sequentially with water, brine dried over MgSO4 concentrated in vacuo The residue was purified by chromatography on silica gel eluting with a gradient of ethyl acetate in dichloromethane (0-20%)

反応条件: temp:-45.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: The product of Example 438A (0.80 g, 3.8 mmol), di-tert-butyl diethylphosphoramidite (1.07 mL, 3.8 mmol), and 1-H-tetrazole (0.63 g, 8.99 mmol) in THF (35 mL) were reacted at room temperature for 12 hours. The reaction was diluted with dichloromethane (35 mL) and cooled to −45° C., and treated with mCPBA (0.90 g, 4.0 mmol) for 0.5 hours then diluted with ethyl acetate (100 mL). The organics were washed with 10% Na2CO3 (2×), brine, dried over MgSO4, and concentrated. The residue was purified by chromatography on silica gel, eluting with a gradient of ethyl acetate in dichloromethane (0-25%) to give the title compound as a colorless oil (0.926 g, 62%). The organics were washed with 10% Na2CO3 (2×), brine dried over MgSO4 concentrated The residue was purified by chromatography on silica gel eluting with a gradient of ethyl acetate in dichloromethane (0-25%)

反応条件: temp:-45.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: The product of Example 438A (0.80 g, 3.8 mmol), di-tert-butyl diethylphosphoramidite (1.07 mL, 3.8 mmol), and 1-H-tetrazole (0.63 g, 8.99 mmol) in THF (35 mL) were reacted at room temperature for 12 hours. The reaction was diluted with dichloromethane (35 mL) and cooled to −45° C., and treated with mCPBA (0.90 g, 4.0 mmol) for 0.5 hours then diluted with ethyl acetate (100 mL). The organics were washed with 10% Na2CO3 (2×), brine, dried over MgSO4, and concentrated. The residue was purified by chromatography on silica gel, eluting with a gradient of ethyl acetate in dichloromethane (0-25%) to give the title compound as a colorless oil (0.926 g, 62%). The organics were washed with 10% Na2CO3 (2×), brine dried over MgSO4 concentrated The residue was purified by chromatography on silica gel eluting with a gradient of ethyl acetate in dichloromethane (0-25%)

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

実験手順: A solution of 2-amino-2-methylpropan-1-ol (1.0 g, 11.2 mmol), triethylamine (1.7 mL, 12.2 mmol) and N-(benzyloxycarbonyloxy)-succinimide (3.1 g, 12.4 mmol) in THF (100 mL) at 0° C. were reacted for 0.5 hours then at room temperature for an additional hour. The reaction was concentrated and extracted with ethyl acetate (100 mL). The organic extract was washed sequentially with water, brine, dried over MgSO4, and concentrated in vacuo. The residue was purified by chromatography on silica gel, eluting with a gradient of ethyl acetate in dichloromethane (0-20%) to give the title compound as a colorless oil (2.5 g, quantitative). at room temperature for an additional hour The reaction was concentrated extracted with ethyl acetate (100 mL) The organic extract was washed sequentially with water, brine dried over MgSO4 concentrated in vacuo The residue was purified by chromatography on silica gel eluting with a gradient of ethyl acetate in dichloromethane (0-20%)

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

実験手順: To a dichloromethane solution containing 2.52 g (0.011 mol) 2-carbobenzoxyamino-2-methyl-1-propanol and 1.17 g (0.015 mol) acetyl chloride was added dropwise with stirring 1.11 g (0.011 mol) triethylamine. The reaction was stirred at ambient temperature overnight and the dichloromethane was removed under reduced pressure. The triethylamine hydrochloride residue was triturated in anhydrous ether. Following filtration, the ether was removed under reduced pressure to afford 2.38 g (0.009 mol), 82%, crude 2-carbobenzoxyamino-2-methyl-1-propyl acetate as a pale yellow liquid, pmr (CDCl3) δ 7.2 (s, 5H), 5.4 (bs, 1H), 5.0 (s, 2H), 2.0 (s, 3H) and 1.2 (s, 6H) ppm. was added dropwise the dichloromethane was removed under reduced pressure The triethylamine hydrochloride residue was triturated in anhydrous ether filtration the ether was removed under reduced pressure