反应详情

31 g (0.25 mol) of p-fluorobenzaldehyde, 49 g (0.25 mol) of methyl 4-fluorobenzoylacetate and 39.25 g (0.25 mol) of ethyl 3-amino-4-methyl-pent-2-enoate are boiled under reflux for 18 hours in 150 ml of ethylene glycol at a bath temperature of 130° C. The mixture is cooled to room temperature, extracted three times using 300 ml of diethyl ether, the combined ether phases are concentrated, and the residue is dissolved in 100 ml of toluene and chromatographed on 700 ml of silica gel (0.04-0.063 mm) using toluene as an eluent.

1. extractionextracted three times
2. concentrationthe combined ether phases are concentrated
3. dissolutionthe residue is dissolved in 100 ml of toluene
4. customchromatographed on 700 ml of silica gel (0.04-0.063 mm)