反应详情

Chloroacetyl chloride (0.50 mL, 6.3 mmol; Acros) was added to a solution of 3-Nitro-6,7,8,9-tetrahydro-5-oxa-9-aza-benzocycloheptene (0.580 g, 2.99 mmol), Triethylamine (1.0 mL, 7.2 mmol), and 4-Dimethylaminopyridine (20 mg, 0.1 mmol; Acros) in Acetonitrile (40 mL) The reaction was stirred under an atmosphere of Nitrogen. After 3.5 h, Pyrrolidine (2.0 mL, 24 mmol) was added and stirred overnight. The mixture was diluted with DCM (30 mL) and water (30 mL), the layers separated and the aq. extracted with 10 mL DCM. The combined organics were washed with brine (20 mL) and dried, then conc. onto 4.5 g Celite. The residue was chromatographed (ISCO, 80 g Basic Alumina, 0-70% EtOAc:Hex) to afford 1-(3-Nitro-7,8-dihydro-6H-5-oxa-9-aza-benzocyclohepten-9-yl)-2-pyrrolidin-1-yl-ethanone as a yellow oil (664 mg, 74%). 1H-NMR (CDCl3): 7.92 (m, 2H), 7.44 (d, 1H, J=8.4 Hz), 4.2-4.6 (m, 4H), 3.15 (m, 2H), 2.48 (m, 4H), 2.10 (m, 2H), 1.70 (m, 4H).

1. stirringstirred overnight
2. customthe layers separated
3. extractionthe aq. extracted with 10 mL DCM
4. washThe combined organics were washed with brine (20 mL)
5. customdried
6. customThe residue was chromatographed (ISCO, 80 g Basic Alumina, 0-70% EtOAc:Hex)