Lithium Hydroxide → 4-[(Diethoxyphosphorylmethyl)-ethoxyphosphinoyl)-benzoic acid

HRID 719249Notes

Reaction equation

HRID 719249 reaction equation
C([O:3][C:4](=[O:25])[C:5]1[CH:10]=[CH:9][C:8]([P:11]([CH2:16][P:17]([O:22][CH2:23][CH3:24])([O:19][CH2:20][CH3:21])=[O:18])([O:13][CH2:14][CH3:15])=[O:12])=[CH:7][CH:6]=1)C.[OH-].[Li+]>CO.O>[CH2:20]([O:19][P:17]([CH2:16][P:11]([O:13][CH2:14][CH3:15])([C:8]1[CH:7]=[CH:6][C:5]([C:4]([OH:25])=[O:3])=[CH:10][CH:9]=1)=[O:12])([O:22][CH2:23][CH3:24])=[O:18])[CH3:21]

Participants

5

Reactant 2

HCID 3939Lithium HydroxideHCID 213024024-[(Diethoxyphosphorylmethyl)-ethoxyphosphinoyl]-benzoic acid ethyl ester

Product 1

HCID 218979184-[(Diethoxyphosphorylmethyl)-ethoxyphosphinoyl)-benzoic acid

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 962WaterSolvent

Procedure

To a solution of 4-[(Diethoxyphosphorylmethyl)-ethoxyphosphinoyl]-benzoic acid ethyl ester (3c) (1 g, 2.55 mmol) in methanol (25 mL) was slowly added lithium hydroxide (monohydrate, 0.11 g, 2.55 mmol) in water (25 mL). The resulting reaction mixture was stirred at room temperature for 4 hours. The reaction mixture was concentrated to remove methanol and diluted with brine, then extracted with EtOAc (3×100 mL) until the aqueous layer showed little or no evidence of product by HPLC. The combined organics were dried over Na2SO4 and concentrated on rotary evaporator. The desired product (3d) was purified by silica gel flash chromatography as a pale yellow oil (0.91 g). 1H NMR (300 MHz, DMSO-d6) δ(ppm)): 1.13 (m, 9H), 2.94 (t, J=18.2 Hz, 2H), 3.85 (m, 6H), 7.88 (m, 2H), 8.02 (m, 2H), 12.60 (bs, 1H), 31P NMR (121 MHz, DMSO-d6) δ, 37.59 and 24.59

Workup

  1. customThe resulting reaction mixture
  2. concentrationThe reaction mixture was concentrated
  3. customto remove methanol
  4. additiondiluted with brine
  5. extractionextracted with EtOAc (3×100 mL) until the aqueous layer
  6. dry with materialThe combined organics were dried over Na2SO4
  7. concentrationconcentrated on rotary evaporator
  8. customThe desired product (3d) was purified by silica gel flash chromatography as a pale yellow oil (0.91 g)

Sources & evidence

ORD record
ord-1f1c07d0bb00412884b231d5bd82996b
Source dataset
uspto-grants-2006_11
Patent number
US07132427B2

Reaction notes

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