反应详情

To undecyl aldehyde (5.0 g) dissolved in methylene chloride was added (carbomethoxymethylene)-triphenylphosphorane (14.7 g), and the mixture was stirred for 2 hours. The reaction mixture was concentrated and subjected to chromatography on a silica gel column with eluent systems of n-hexane-ethyl acetate (from 100:1 to 20:1) to give the methyl ester of trans-2-tridecenoic acid (55.2 g). To the methyl ester dissolved in tetrahydrofuran was added lithium aluminium hydride (0.9 g) under ice-cooling, and the mixture was stirred for 1 hour. The reaction mixture was distributed into ethyl acetate and water, and the ethyl acetate layer was dried, concentrated and subjected to chromatography on a silica gel column with an eluent system of n-hexane-ethyl acetate (50:1) to give trans-2-tridecenol (3.2 g). To the solution of the trans-2-tridecenol in methylene chloride were added pyridinium chlorochromate (3.2 g) and Celite (5.0 g), and the mixture was stirred. The reaction mixture was filtered and concentrated to give trans-2-tridecenal (1.7 g).

1. filtrationThe reaction mixture was filtered
2. concentrationconcentrated