[OH:1][CH2:2]/[C:3](/[CH2:12][CH2:13]/[CH:14]=[C:15](\[CH3:22])/[CH2:16][CH2:17][CH:18]=[C:19]([CH3:21])[CH3:20])=[CH:4]/[CH2:5][CH2:6]/[C:7](/[CH3:11])=[CH:8]/[CH2:9][OH:10].[OH-].[Na+].C(O)(=O)C.[BH4-].[Na+]>O1CCCC1>[OH:1][CH2:2]/[C:3](/[CH2:12][CH2:13]/[CH:14]=[C:15](/[CH3:22])\[CH2:16][CH2:17][CH:18]=[C:19]([CH3:21])[CH3:20])=[CH:4]/[CH2:5][CH2:6]/[C:7](/[CH3:11])=[CH:8]/[CH2:9][OH:10]
In 125 ml of anhydrous tetrahydrofuran was suspended 18 g of (E)-4-methyl-6-acetoxy-4-hexen-1-yltriphenylphosphonium iodide, and to this suspension was added dropwise two molar equivalents of a n-butyllithium-hexane solution at -20° C in a stream of nitrogen. The resulting mixture was stirred at -20° C in a for 1 hour and to this was further added 8.4 g of (Z)-1,1-diethoxy-6,10-dimethyl-5,9-undecadien-2-one (prepared in Referential example 3) in 25 ml of anhydrous tetrahydrofuran. The mixture was then stirred at room temperature for 3 hours and, after addition of ice-water, extracted with n-hexane, and from the extract was obtained an oil. The oil was treated with a sodium hydroxide solution and acetic acid and reduced with 150 mg of sodium borohydride in the same manner as in Example 13, yielding 3.0 g of a mixture of the (E,Z,Z) and (E,E,Z) isomers.
読み込み中…
