反应详情

For the synthesis of this starting compound, 1.80 g (12.3 mmol, 1.1 eq) of bromomalondialdehyde was first dissolved in 30 ml of ethanol, and 1.25 ml of m-anisidine was added. This reaction mixture is stirred over night at RT and, after the addition of acetic acid (20 ml), at 100° C. for 10 days. The solvent is subsequently removed in vacuum on a rotary evaporator, and the residual solid is partitioned between a water and an ethyl acetate phase. The aqueous phase is made alkaline with an ammonia solution, and insoluble particles were filtered off. The filtrate is extracted with ethyl acetate, and the organic phase is dried over MgSO4, filtered, and the solvent is removed in vacuum on a rotary evaporator. The product was purified by column chromatography with a mixture of hexane/ethyl acetate 8/2 as the eluent in a yield of 20% (700 mg).

1. customThe solvent is subsequently removed in vacuum on a rotary evaporator
2. customthe residual solid is partitioned between a water
3. filtrationwere filtered off
4. extractionThe filtrate is extracted with ethyl acetate
5. dry with materialthe organic phase is dried over MgSO4
6. filtrationfiltered
7. customthe solvent is removed in vacuum on a rotary evaporator
8. customThe product was purified by column chromatography with a mixture of hexane/ethyl acetate 8/2 as the eluent in a yield of 20% (700 mg)