反应详情

Preparation I2, Step 1: A solution of mono-benzyl malonate (1.1 g, 5.6 mmol) in 3:1 CH2Cl2/DMF (28 mL) was treated sequentially with N,N-diisopropylethylamine (2.5 mL, 14.0 mmol), meta-trifluoromethoxy-phenylamine (0.75 mL, 5.6 mmol), and HATU (2.6 g, 6.7 mmol). The mixture was stirred for 12 h at RT, concentrated in vacuo, and partitioned between EtOAc and sat. NH4Cl. The aqueous phase was extracted with EtOAc (1×). The combined organic extracts were washed with sat. NaHCO3 and brine, dried (Na2SO4), filtered, and concentrated in vacuo. The residue was purified by flash chromatography to provide N-(3-trifluoromethoxy-phenyl)-malonamic acid benzyl ester as an oil (1.65 g).

1. concentrationconcentrated in vacuo
2. custompartitioned between EtOAc and sat. NH4Cl
3. extractionThe aqueous phase was extracted with EtOAc (1×)
4. washThe combined organic extracts were washed with sat. NaHCO3 and brine
5. dry with materialdried (Na2SO4)
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. customThe residue was purified by flash chromatography