Alpha-Methylstyrene → HCID 12551067, compound

Participants

Reaction Steps

To a solution of α-methylstyrene (570 mL, 4.4 mol), 1,8-diazabicyclo[5.4.0]undec-7-ene (240 mL, 1.6 mol) and copper (II) bromide (9.8 g, 44 mmol) in toluene (700 mL) was added diethyl bromomalonate (210 g, 0.88 mol) at 0° C., and the mixture was stirred for 22 hours at room temperature. The obtained solution was washed with saturated aqueous ammonium chloride solution and saturated aqueous sodium chloride solution, and dried over sodium sulfate. Then, the solution was filtrated and the solvent was evaporated. The obtained residue was separated and purified by silica gel chromatography (hexane:ethyl acetate=20:1) to give the title compound (110 g, yield 45%) as a colorless oil.

Provenance & Evidence