Hydrochloric Acid → Diisobutyl-n-heptyl-phosphine oxide

HRID 1834544Notes

Reaction equation

HRID 1834544 reaction equation
[CH2:1]([P:5](Cl)([CH2:7][CH:8]([CH3:10])[CH3:9])=[O:6])[CH:2]([CH3:4])[CH3:3].[CH2:12]([Mg]Br)[CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH3:18].Cl>O1CCCC1>[CH2:1]([P:5](=[O:6])([CH2:7][CH:8]([CH3:10])[CH3:9])[CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH3:18])[CH:2]([CH3:4])[CH3:3]

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 22481195Diisobutylphosphinyl chlorideHCID 178443916HCID 178443916, compound

Product 1

HCID 22481194Diisobutyl-n-heptyl-phosphine oxide

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A solution of di-isobutylphosphinyl chloride* (3.9g., 0.02 mole) in tetrahydrofuran (50 ml.) was added dropwise to a refluxing solution of n-heptylmagnesium bromide (prepared from magnesium turnings (1.2g., 0.05 mole), n-heptyl bromide (9.0g., 0.05 mole) and tetrahydrofuran (100 ml.)). The mixture was heated under reflux for 18 hours. After cooling to room temperature, the reaction mixture was poured onto ice and 2N HCl (300 ml.), and extracted with methylene dichloride (4 × 200 ml.). The combined extracts were washed with lithium hypochlorite solution, 2N NaOH solution and finally with water, then dried (MgSO4). The solvent was removed by distillation and the residual yellow oil (8g.) was eluted with chloroform down a silica gel column. The product (Rf = 0.1- 0.2 on silica t.l.c. (CHCl3)) was finally distilled to yield diisobutyl-n-heptyl-phosphine oxide as a colourless liquid, bp. 120°-2°/0.03 mm. (Found C 68.8; H 13.0; C15H33OP requires C 69.3; H, 12.7%.

Workup

  1. temperatureThe mixture was heated
  2. temperatureunder reflux for 18 hours
  3. extractionextracted with methylene dichloride (4 × 200 ml.)
  4. washThe combined extracts were washed with lithium hypochlorite solution, 2N NaOH solution and finally with water
  5. dry with materialdried (MgSO4)
  6. customThe solvent was removed by distillation
  7. washthe residual yellow oil (8g.) was eluted with chloroform down a silica gel column
  8. distillationThe product (Rf = 0.1- 0.2 on silica t.l.c. (CHCl3)) was finally distilled

Sources & evidence

ORD record
ord-e6cf7232ea8649b1a38435e3869382f2
Source dataset
uspto-grants-1978_01
Patent number
US04070496

Reaction notes

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