反应详情

温度

-10 °C

To a solution of [2-(1H-imidazol-4-yl)-ethyl]-carbamic acid tert-butyl ester (512 mg, 2.42 mmol) in THF (20 mL) at −10° C. was added NaH (60%, 97 mg, 2.42 mmol). After stirring at −10° C. for 30 min, MeI (0.14 mL, 2.17 mmol) was added. After stirring at −10° C. for 2.5 h, the reaction mixture was concentrated to afford a yellow oil. Purification by flash column chromatography on silica gel using 2% MeOH/CH2Cl2 afforded [2-(1-methyl-1H-imidazol-4-yl)-ethyl]-carbamic acid tert-butyl ester as a yellow oil (144 mg, 34%). Deprotection with TFA using General Procedure F gave [2-(lmethyl-1H-imidazol-4-yl)-ethyl]-amine as a yellow oil (51 mg, 25%).

1. stirringAfter stirring at −10° C. for 2.5 h
2. concentrationthe reaction mixture was concentrated
3. customto afford a yellow oil
4. customPurification by flash column chromatography on silica gel using 2% MeOH/CH2Cl2