反应详情

温度

0 °C

Under a N2 blanket, a solution of lithium dimethylcuprate was prepared at 0° C. from cuprous iodide (7.6 g, 0.04 mol) and a solution of methyl-lithium in ether (80 ml, 1 M, 0.08 mol). A solution of methyl m-methoxycinnamate (4.8 g, 0.025 mol) in ether (20 ml) was then added dropwise and the reaction mixture was stirred for 1 hour at 0° C. A large volume of water was cautiously added, after which the ether layer was separated, dried (anhydrous Na2SO4) and evaporated to dryness. The residue was chromatographed on silica gel (100 g) with hexane/ethyl acetate (80:20) as eluent, giving 3.65 g methyl β-(m-methoxyphenyl)-butyrate (68% yield by weight).

1. customafter which the ether layer was separated
2. dry with materialdried (anhydrous Na2SO4)
3. customevaporated to dryness
4. customThe residue was chromatographed on silica gel (100 g) with hexane/ethyl acetate (80:20) as eluent