Potassium Hydroxide → Tris(6-(2-hydroxyphenyl)-2-pyridyl)phosphine oxide

HRID 13636

Reaction equation

HRID 13636 reaction equation
C[O:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][C:4]=1[C:9]1[N:14]=[C:13]([P:15](=[O:44])([C:30]2[CH:35]=[CH:34][CH:33]=[C:32]([C:36]3[CH:41]=[CH:40][CH:39]=[CH:38][C:37]=3[O:42]C)[N:31]=2)[C:16]2[CH:21]=[CH:20][CH:19]=[C:18]([C:22]3[CH:27]=[CH:26][CH:25]=[CH:24][C:23]=3[O:28]C)[N:17]=2)[CH:12]=[CH:11][CH:10]=1.Cl.[NH+]1C=CC=CC=1.[OH-].[K+]>O>[OH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][C:4]=1[C:9]1[N:14]=[C:13]([P:15](=[O:44])([C:30]2[CH:35]=[CH:34][CH:33]=[C:32]([C:36]3[CH:41]=[CH:40][CH:39]=[CH:38][C:37]=3[OH:42])[N:31]=2)[C:16]2[CH:21]=[CH:20][CH:19]=[C:18]([C:22]3[CH:27]=[CH:26][CH:25]=[CH:24][C:23]=3[OH:28])[N:17]=2)[CH:12]=[CH:11][CH:10]=1

Participants

5

Reactant 3

HCID 14797Potassium HydroxideHCID 21584435Pyridinium hydrochlorideHCID 86608172Tris(6-(2-methoxyphenyl)-2-pyridyl)phosphine oxide

Product 1

HCID 136335748Tris(6-(2-hydroxyphenyl)-2-pyridyl)phosphine oxide

Reagents, catalysts & solvents 1

HCID 962WaterSolvent2×

Conditions

Temperature
130 °C

Procedure

A mixture of 30.0 g (50 mmol) of tris(6-(2-methoxyphenyl)-2-pyridyl)phosphine oxide and 104.0 g (900 mmol) of pyridinium hydrochloride was stirred at 130° C. for 12 h. After the melt had been cooled to 80° C., it was admixed with 300 ml of water and then with a solution of 44.9 g (800 mmol) of potassium hydroxide in 100 ml of water. The aqueous phase was extracted three times with 500 ml of dichloromethane. The combined organic phases were washed three times with 500 ml of water. After the organic phase had been dried over magnesium sulfate and the dichloromethane had been removed, the oily residue was taken up in 100 ml of methyl tert-butyl ether and admixed with 100 ml of n-heptane. After standing for 12 h, the colorless crystals were filtered off with suction and recrystallized from methyl tert-butyl ether/n-heptane. The yield was 10.9 g (39.1%) at a purity of greater than 99.0% by 1H NMR.

Workup

  1. temperatureAfter the melt had been cooled to 80° C.
  2. extractionThe aqueous phase was extracted three times with 500 ml of dichloromethane
  3. washThe combined organic phases were washed three times with 500 ml of water
  4. dry with materialAfter the organic phase had been dried over magnesium sulfate
  5. customthe dichloromethane had been removed
  6. waitAfter standing for 12 h
  7. filtrationthe colorless crystals were filtered off with suction
  8. customrecrystallized from methyl tert-butyl ether/n-heptane

Sources & evidence

ORD record
ord-8542c5073f6741af808c7f8a6333183f
Source dataset
uspto-grants-2010_06
Patent number
US07728137B2

Linked notes

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