反应详情

A solution of methyl 4-chloro-3-nitrobenzoate (5.00 g, 23.2 mmol), cylohexylamine (3.98 mL, 34.8 mmol), and triethylamine (4.8 ML, 35 mmol) in acetonitrile (75 mL) was reluxed for 22 h under an argon atmosphere. The reaction mixture was concentrated to a volume of ˜20 mL and the precipitated solid was filtered. The filtrate was diluted with ethyl acetate and was washed with 1M citric acid (1×) followed by saturated NaHCO3 (1×). The organic layer was dried (MgSO4) and concentrated on a rotary evaporator. The residue was purified by column chromatography (silica gel, 50-70% dichloromethane/hexanes (v/v)) to give compound 45 as a yellow solid (6.32 g, 98%). ESI-MS m/e 279.2 (M+1).

1. concentrationThe reaction mixture was concentrated to a volume of ˜20 mL
2. filtrationthe precipitated solid was filtered
3. additionThe filtrate was diluted with ethyl acetate
4. washwas washed with 1M citric acid (1×)
5. dry with materialThe organic layer was dried (MgSO4)
6. concentrationconcentrated on a rotary evaporator
7. customThe residue was purified by column chromatography (silica gel, 50-70% dichloromethane/hexanes (v/v))