10-bromodecanal

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

Procedure: 68.1 g (149 mmol) of (4-carboxy-3-methyl-butyl)-triphenylphosphonium bromide were placed in 150 ml of THF and treated with 33.4 g (298 mmol) of potassium t-butylate in 50 ml of THF. 35 g (149 mmol) of 10-bromodecanal were added to this mixture After usual work up 111.8 g of crude product were obtained and, after chromatography, 29 g of 3-methyl-5Z-15-bromopentadec-5-enoic acid were obtained having the following characteristics: were obtained

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

Procedure: 60 g (0.13 mol) of (5-carboxypentyl)triphenylphosphonium bromide were suspended in 250 ml of tetrahydrofuran. 30 g (0.26 mol) of potassium t-butylate in 20 ml of tetrahydrofuran were then added. Subsequently, 26 g (0/11 mol) of 10-bromodecanal were added. After usual work up 28 g (65%) of crude 6Z-16-bromohexadec-6-enoic acid were obtained having the following characteristics: Z/E=93/7;