33956-49-9

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: FIGS. 24A and 24B show another synthesis of E,E-8,10-dodecadienol. With reference to FIG. 24A, 8-chlorooctan-1-yl acetate was synthesized from the cross metathesis of 1,10-diacetoxy-5-decene and 1,6-dichloro-3-hexene with Catalyst 801 to yield 8-chloro-5-octen-1-yl acetate, which was reduced and deacetylated. With reference to FIG. 24B, 8-chlorooctan-1-yl acetate was refluxed with two equivalents of triethyl phosphite in toluene for four hours to yield the octanol phosphonate intermediate. The mixture was cooled to −40° C. under argon. Lithium diisopropyl amine was added (2.3 mol equivalents to the phosphonate) and slowly warmed to room temp. Freshly distilled crotonaldehyde (2 mol equivalents) was added and stirred at room temp for 4 hours. The mixture was worked up to yield 8,10-dodecadienol.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of trans,trans-8,10-dodecadien-1-ol (1.82 g), triethylamine (3.5 ml) and triethyl-chlorosilane (1.85 ml) is held at 25° C. for 15 hours. After dilution of the mixture with hexane (100 ml), it is thoroughly washed with ice-water (3×50 ml), dried (CaSO4), concentrated by evaporation and distilled. The title compound is obtained in the boiling range of 107° to 112° C. (nD20 =1.4697). After dilution of the mixture with hexane (100 ml), it is thoroughly washed with ice-water (3×50 ml) dried (CaSO4) concentrated by evaporation distilled