undec-2-en-1-ol

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: A mixture of 2-undecen-1-ol and methyl 11-hydroxy-9-undecenoate (0.5 ml, obtained from the cross-metathesis of methyl oleate with butenediol; composition: 8.7% methyl oleate, 13.2% 9-octadecene and 1,18-dimethyl-9-octadecenedicarboxylic acid, 61.2% alcohol cross-metathesis products, 16.9% aldehyde cross-metathesis products) and 4.5 ml of ethylene glycol are combined. Further samples are taken for GC, GC-MS and GPC. By means of a magnetic stirrer, the reaction mixture is stirred at 120° C. for 60 minutes. After 5, 30 and 60 minutes the samples for GC, GC-MS and GPC measurements are taken and the reaction is stopped. Conversion of both alcohol cross-metathesis products after 60 minutes: 90%. Total yield (over two steps) of the 2-decyl-[1,3]dioxolane (protected undecanal): 67%; total yield (over two steps) of the methyl undecanoate-11-[1,3]dioxolane (protected methyl 11-oxoundecanoate): 69%; by-products (oligomers): 5%.

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

Procedure: Isomerization of a mixture of 2-undecen-1-ol and methyl 11-hydroxy-9-undecenoate: The mixture was obtained by means of cross-metathesis of methyl oleate and butenediol. After removal of the solvent on a rotary evaporator, where necessary, a reagent forming protective groups was added, without further working-up steps and without addition or removal of components, and the reaction was carried out further as described under “Isomerization of trans-2-undecen-1-ol”.