p-Toluenesulfonic acid → HCID 53765700, compound

Participants

Reaction Steps

In 120 ml of anhydrous tetrahydrofuran was suspended 23.1 g of (E)-4-methyl-6-(2'-tetrahydropyranyloxy)-4-hexen-1-yltriphenylphosphonium iodide. In the same manner as in Example 2-(1), the equimolar amount of n-butyllithium and 7.2 g of 6-acetoxymethyl-10-methyl-5,9-undecadien-2-one prepared in Referential Examples 4 and 5 were added to the suspension, and the Wittig reaction was carried out. The product was hydrolyzed with 70 ml of an alcoholic sodium hydroxide (5%) and treated overnight with methanol containing 100 mg of p-toluenesulfonic acid at room temperature. This was then purified by the silica gel (100 g) column chromatography to yield 3.7 g of the desired product, which was a mixture of the (E,E,E), (E,Z,Z), (E,Z,E) and (E,E,Z) isomers.

Provenance & Evidence