反应详情

Iron chips (5 g) were added in one portion to 9.8 g of 2′-methoxy-3-nitrobiphenyl-4-acetic acid in 50 hours. The reaction mixture was concentrated to dryness, sonicated in ethyl acetate and filtered to remove the insolubles. The filtrate was washed twice with 1N hydrochloric acid, water, brine, dried over anhydrous sodium sulfate and concentrated. The residue was purified by column chromatography on silica gel in ethyl acetate:hexane 1:2 to give 5.4 g (69 % yield based on-5-bromo-2-fluoronitrobenzene) of 6-(2-methoxyphenyl)-2-oxindole as a rose colored solid.

1. concentrationThe reaction mixture was concentrated to dryness
2. customsonicated in ethyl acetate
3. filtrationfiltered
4. customto remove the insolubles
5. washThe filtrate was washed twice with 1N hydrochloric acid, water, brine
6. dry with materialdried over anhydrous sodium sulfate
7. concentrationconcentrated
8. customThe residue was purified by column chromatography on silica gel in ethyl acetate:hexane 1:2