Reaktion #7284
ord-3a94411701474d1b8e1c6e2c85202c12
Reaktionsgleichung
Reagenzien
Reaktionsbedingungen
Aufarbeitung
- 1TemperaturThe reaction was cooled
- 2Sonstigequenched with MeOH (5 mL)
- 3Temperaturheated at 50° C. for 1 h
- 4TemperaturThe resultant mixture was cooled
- 5Einengenconcentrated under reduced pressure
- 6workup.ADDITIONdiluted with 3 N HCl (5 mL)
- 7Temperaturheated at 80° C. for 6 h
- 8TemperaturAfter cooling
- 9workup.ADDITIONan aqueous 15% NaOH solution was added until a basic pH (pH=13)
- 10Sonstigewas obtained
- 11Extraktionthe mixture was extracted with CH2Cl2 (3×10 mL)
- 12SonstigeThe phases were separated
- 13Trocknenthe combined organic fractions were dried (Na2SO4)
- 14Einengenconcentrated under reduced pressure
- 15Sonstigepurified by column chromatography on silica gel (CH2Cl2/MeOH/NH4OH, 100:10:1)
Vorschrift
To a solution of N-benzyl-2-[2-(hydroxymethyl)-pyridin-3-yl]-acetamide (357 mg, 1.5 mmol) in THF (2 mL) was added borane in THF (5 mL of a 1.0 M solution, 5 mmol) and the mixture heated at 50° C. for 3 h. The reaction was cooled, quenched with MeOH (5 mL) and heated at 50° C. for 1 h. The resultant mixture was cooled, concentrated under reduced pressure, diluted with 3 N HCl (5 mL) and heated at 80° C. for 6 h. After cooling, an aqueous 15% NaOH solution was added until a basic pH (pH=13) was obtained and the mixture was extracted with CH2Cl2 (3×10 mL). The phases were separated and the combined organic fractions were dried (Na2SO4), concentrated under reduced pressure and purified by column chromatography on silica gel (CH2Cl2/MeOH/NH4OH, 100:10:1) to afford benzyl-2-[2-(hydroxymethyl)-pyridin-3-yl]-ethylamine (86 mg, 41%) as a yellow oil. 1H NMR (CDCl3) 2.75 (t, 2H, J=6.8 Hz), 2.88 (t, 2H, J=6.8 Hz), 4.75 (s, 2H), 7.18–7.34 (m, 6H), 7.50 (d, 1H, J=7.8 Hz), 8.43 (d, 1H, J=4.9 Hz). ES-MS m/z 243 (M+H).