反应详情

温度

-78 °C

A solution of [2-(3-bromo-benzo[b]thiophen-2-yl)-ethyl]-dimethyl-amine (285 mg, 1 mmol) and TMEDA (181 uL, 1.2 mmol) in toluene (12 mL) was cooled to −78° C. n-BuLi (750 uL, 1.2 mmol, 1.6M in hexanes) was added and the reaction was stirred at −78° C. for 45 min. 2-Methyl-oxirane (280 uL, 4 mmol) was added at −78° C. and the reaction was allowed to slowly reach room temperature, while being stirred overnight. The reaction was quenched with NH4Cl, pH was adjusted with sat. NaHCO3 until pH ˜9, followed by an extraction with EtOAc (4×). The combined organic layers were washed with brine, dried (MgSO4) and concentrated. Silica gel column chromatography (eluent: dichloromethane with gradient up to dichloromethane/MeOH=97/3) afforded 46 mg of 1-[2-(2-dimethylamino-ethyl)-benzo[b]thiophen-3-yl]-propan-2-ol (Compound 23-1).

1. additionwas added
2. customwas allowed to slowly reach room temperature
3. stirringwhile being stirred overnight
4. customThe reaction was quenched with NH4Cl, pH
5. extractionfollowed by an extraction with EtOAc (4×)
6. washThe combined organic layers were washed with brine
7. dry with materialdried (MgSO4)
8. concentrationconcentrated