11-hydroxyundecan-2-one

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

Procedure: 164.6 g (0.37 mol) of (4-carboxybutyl)triphenylphosphonium bromide were suspended in 700 ml of tetrahydrofuran. 101 g (0.9 mol) of potassium t-butylate in 150 ml of tetrahydrofuran were added and then 68 g (0.36 mol) of 11-hydroxy-2-undecanone in 50 ml of tetrahydrofuran were added After usual working up there were obtained 98 g of crude 5Z-6-methylpentadec-5-enoic acid.