[benzyl(trimethylsilylmethyl)amino]methanol

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

実験手順: To a stirred solution of ethyl (2E)-3-cyclopropylacrylate (5.3 g, 37.9 mmol) and TFA (0.43 g, 3.79 mmol) in DCM (100 mL) was added dropwise {benzyl[(trimethylsilyl)methyl]amino}methanol (13.5 g, 56.8 mmol) at 0° C. After the addition, the mixture was refluxed overnight. TLC (petroleum ether: EtOAc 10:1) indicated most of ethyl (2E)-3-cyclopropylacrylate was consumed. The reaction mixture was quenched with sat. NaHCO3 (100 mL), brine (100 mL), dried over Na2SO4 and concentrated in vacuo. The residue was purified by column chromatography (silica gel, petroleum ether: EtOAc=50:1 to 30:1) to give the title compound (5.8 g, 54% yield) as a yellow oil. After the addition the mixture was refluxed overnight was consumed The reaction mixture was quenched with sat. NaHCO3 (100 mL), brine (100 mL) dried over Na2SO4 concentrated in vacuo The residue was purified by column chromatography (silica gel, petroleum ether: EtOAc=50:1 to 30:1)

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

実験手順: To a stirred solution of ethyl (2E)-5,5,5-trifluoropent-2-enoate (3.0 g, 16.5 mmol) and TFA (0.38 g, 3.3 mmol) in DCM (40 mL) was added dropwise {benzyl[(trimethylsilyl)methyl]amino}methanol (7.8 g, 33 mmol) at 0° C. over a period of 30 min. After the addition, the mixture was refluxed overnight. TLC (petroleum ether:EtOAc 10:1) indicated ethyl (2E)-5,5,5-trifluoropent-2-enoate was consumed. The reaction mixture was washed with sat. NaHCO3 (40 mL), brine (40 mL), dried over Na2SO4 and concentrated in vacuo. The residue was purified by column chromatography (silica gel, petroleum ether:EtOAc=100:1 to 10:1) to give the title compound (5.1 g, 98% yield) as a yellow oil. After the addition the mixture was refluxed overnight was consumed The reaction mixture was washed with sat. NaHCO3 (40 mL), brine (40 mL) dried over Na2SO4 concentrated in vacuo The residue was purified by column chromatography (silica gel, petroleum ether:EtOAc=100:1 to 10:1)

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

実験手順: To a stirred solution of ethyl (2E)-3-cyclopropylacrylate (5.3 g, 37.9 mmol) and TFA (0.43 g, 3.79 mmol) in DCM (100 mL) was added dropwise {benzyl[(trimethylsilyl)methyl]amino}methanol (13.5 g, 56.8 mmol) at 0° C. After the addition, the mixture was refluxed overnight. TLC (petroleum ether: EtOAc 10:1) indicated most of ethyl (2E)-3-cyclopropylacrylate was consumed. The reaction mixture was quenched with sat. NaHCO3 (100 mL), brine (100 mL), dried over Na2SO4 and concentrated in vacuo. The residue was purified by column chromatography (silica gel, petroleum ether: EtOAc=50:1 to 30:1) to give the title compound (5.8 g, 54% yield) as a yellow oil. After the addition the mixture was refluxed overnight was consumed The reaction mixture was quenched with sat. NaHCO3 (100 mL), brine (100 mL) dried over Na2SO4 concentrated in vacuo The residue was purified by column chromatography (silica gel, petroleum ether: EtOAc=50:1 to 30:1)

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

実験手順: To a stirred solution of ethyl (2E)-5,5,5-trifluoropent-2-enoate (3.0 g, 16.5 mmol) and TFA (0.38 g, 3.3 mmol) in DCM (40 mL) was added dropwise {benzyl[(trimethylsilyl)methyl]amino}methanol (7.8 g, 33 mmol) at 0° C. over a period of 30 min. After the addition, the mixture was refluxed overnight. TLC (petroleum ether:EtOAc 10:1) indicated ethyl (2E)-5,5,5-trifluoropent-2-enoate was consumed. The reaction mixture was washed with sat. NaHCO3 (40 mL), brine (40 mL), dried over Na2SO4 and concentrated in vacuo. The residue was purified by column chromatography (silica gel, petroleum ether:EtOAc=100:1 to 10:1) to give the title compound (5.1 g, 98% yield) as a yellow oil. After the addition the mixture was refluxed overnight was consumed The reaction mixture was washed with sat. NaHCO3 (40 mL), brine (40 mL) dried over Na2SO4 concentrated in vacuo The residue was purified by column chromatography (silica gel, petroleum ether:EtOAc=100:1 to 10:1)