Palmitic Acid → Hexadecanoyl Bromide

HRID 2251632Notes

Reaction equation

HRID 2251632 reaction equation
S(Br)([Br:3])=O.[C:5]([OH:22])(=O)[CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH3:20]>O>[C:5]([Br:3])(=[O:22])[CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH3:20]

Participants

4

Reactant 2

HCID 985Palmitic AcidHCID 68176Thionyl bromide3×

Product 1

HCID 10041615Hexadecanoyl Bromide

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
50 °C

Procedure

In a dry 2-necked, round bottomed flask, equipped with a magnetic stirrer and fixed with a separatory funnel, containing 7.75 ml (100 mmol) of thionyl bromide, and a water condenser, is placed 12.82 g (50 mmol) of palmitic acid. Addition of the thionyl bromide is completed with heating to about 50° C. over the course of about 50 minutes. When addition of the thionyl bromide is complete the mixture is heated and stirred for an additional hour. The water condenser is then replaced with a distillation side arm condenser and the crude mixture is distilled. The crude distillate in the receiving flask is then fractionally distilled to obtain the acyl bromide, palmitoyl bromide. This acyl bromide, 16.02 g (50 mmol), is put into a dry separatory funnel and combined with 75 ml of dry dichloromethane for use in the next step of the reaction.

Workup

  1. customIn a dry 2-necked, round bottomed flask, equipped with a magnetic stirrer
  2. customfixed with a separatory funnel
  3. temperatureis heated
  4. distillationthe crude mixture is distilled
  5. distillationThe crude distillate in the receiving flask is then fractionally distilled

Sources & evidence

ORD record
ord-a031e42e59e442e19b4bcb72c40bdf32
Source dataset
uspto-grants-2008_01
Patent number
US07319157B1

Reaction notes

Loading…