Toluene → 5-Isopropyl-1,3-dimethyl-bicyclo[3.2.1]oct-3-en-2-one

関与物質

反応手順

To a solution of 2,6-dimethyl-6-(3-methyl-but-2-enyl)-cyclohex-2-enone (5.00 g, 26.04 mmol) in toluene (40 ml) was added dropwise neat EtAlCl2 (97%, 1.5 eq., 4.96 g, 39.06 mmol). During the addition, the temperature was kept below 10° C. The brown mixture was kept at room temperature over night and was then poured on icecold saturated NH4Cl. The mixture was extracted with MTBE, washed with brine, dried (MgSO4) and concentrated in vacuo. The residue was distilled bulb to bulb to yield 4.50 g (90%) of an colorless oil.

情報源と証拠