Hydrochloric Acid → HCID 72732177, compound

Participants

Reaction Steps

Sodium hydride (28.69, content: 63%) was suspended in tetrahydrofuran (1000 ml). Diethyl ethoxycarbonylmethylphosphonate (168 g) dissolved in tetrahydrofuran (500 ml) was added dropwise into the mixture with cooling in an ice-bath over 30 mins. 4-Pentylacetophenone (95 g) in tetrahydrofuran (500 ml) was added to the solution. The solution was stirred overnight at a room temperature and then refluxed at 8 hrs. Tetrahydrofuran was evoporated from the reaction mixture. Diluted hydrochloric acid was added to the residue. The acidic solution was extracted with ethyl acetate. The ertract was dried over magnesium sulfate and evaporated. The residue was purified by column chromatography on silica gel (n-hexane: ethyl acetate=99:1→98:2→95:5) to give the title compound (128 g) having the following physical data:

Provenance & Evidence