反应详情

A solution of methoxycarbonylmethyl(triphenyl)phosphonium bromide (1.1 g, TCI) in THF (12.5 ml) was added with sodium hydride (115 mg, WAKO) under ice cooling, warmed to room temperature, then added dropwise with a solution of 3-nitro-4-(piperazin-1-yl)benzaldehyde (550.6 mg, MAYB) in THF (12.5 ml), and stirred at the same temperature for 16.5 hours. The reaction mixture was poured into brine (40 ml), and extracted with ethyl acetate (100 ml). The organic layer was washed successively with saturated aqueous sodium hydrogencarbonate and saturated brine, and dried, and then the solvent was evaporated under reduced pressure. The residue was purified by flash column chromatography (hexane:ethyl acetate=5:1) to obtain the title compound (Intermediate Int. n-19, 511 mg).

1. extractionextracted with ethyl acetate (100 ml)
2. washThe organic layer was washed successively with saturated aqueous sodium hydrogencarbonate and saturated brine
3. customdried
4. customthe solvent was evaporated under reduced pressure
5. customThe residue was purified by flash column chromatography (hexane:ethyl acetate=5:1)