反应详情

To a solution of 2-chloro-3-nitro-6-picoline (500 mg, 2.99 mmol) in DMF (3 mL) were added the (S)-3-amino-hexanoic acid ethyl ester (554 mg, 3.48 mmol) and diisopropylethyl amine (DIPEA) (1.0 mL, 5.80 mmol). The reaction mixture was stirred at room temperature for 48 hours. The reaction mixture was then diluted with ethyl acetate and washed with water (×4). The organic phase was then dried over Na2SO4 and concentrated. The resulting residue was purified by preparative TLC using hexane and ethyl acetate (4:1) as an eluent to afford 358 mg (42%) of the title compound as orange oil. LCMS, M++1, m/z: 296.65.

1. washwashed with water (×4)
2. dry with materialThe organic phase was then dried over Na2SO4
3. concentrationconcentrated
4. customThe resulting residue was purified by preparative TLC