Thionyl Chloride → Decenoyl chloride

関与物質

反応手順

Thionyl chloride (8 ml) was added to trans-2-decenoic acid (3.4 g, 0.02 mol) followed by refluxing on a hot water bath for 2 hours. An excessive thionyl chloride was evaporated in vacuo to give 2-decenoic acid chloride. Pyridine (1 ml) was added to a solution of N,N-dimethylaminoethanol (2.0 g, 0.022 mol) in tetrahydrofuran (30 ml) followed by dropping into a solution of 2-decenoic acid chloride in tetrahydrofuran (20 ml). The reaction solution was heated to reflux on a hot water bath for 3 hours, tetrahydrofuran was evaporated in vacuo, water and ethyl acetate were added to the residue to partition and an ethyl acetate layer was collected therefrom. The ethyl acetate layer was washed with water and evaporated followed by purifying by silica gel column chromatography (developer: chloroform) to give the aimed compound as a light brown oily product.

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