Diethyl (cyanomethyl)phosphonate → HCID 66824380, compound

HRID 1876880Notes

Reaction equation

HRID 1876880 reaction equation
CC(C)([O-])C.[K+].[C:7]([CH2:9]P(=O)(OCC)OCC)#[N:8].O=[C:19]1[CH2:22][CH:21]([C:23]#[N:24])[CH2:20]1>O1CCCC1>[C:7]([CH:9]=[C:19]1[CH2:22][CH:21]([C:23]#[N:24])[CH2:20]1)#[N:8]

Participants

5

Reactant 3

HCID 75676Diethyl (cyanomethyl)phosphonateHCID 130823903-Oxocyclobutane-1-carbonitrileHCID 23665647Potassium tert-butoxide

Product 1

HCID 66824380HCID 66824380, compoundYield 23.3%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent3×

Procedure

To a solution of 1.0 M of potassium tert-butoxide in tetrahydrofuran (78.4 mL) at 0° C. was added drop wise a solution of diethyl cyanomethylphosphonate (13.3 mL, 0.0822 mol) in tetrahydrofuran (100 mL, 2 mol). The reaction was warmed to room temperature and then cooled at 0° C. again. To the reaction mixture was a solution of 3-oxocyclobutanecarbonitrile (7.10 g, 0.0746 mol) in tetrahydrofuran (70 mL). The reaction was allowed to warm up to room temperature and stirred overnight. After being quenched with water, the mixture was extracted with ether. The combined organic layers were washed with water, brine, dried over MgSO4, and evaporated to dryness. The crude mixture was purified on silica gel, eluting with 0 to 40% EtOAc in hexanes, to give the desired product (2.05 g, 23.2%).

Workup

  1. temperaturecooled at 0° C. again
  2. temperatureto warm up to room temperature
  3. customAfter being quenched with water
  4. extractionthe mixture was extracted with ether
  5. washThe combined organic layers were washed with water, brine
  6. dry with materialdried over MgSO4
  7. customevaporated to dryness
  8. customThe crude mixture was purified on silica gel
  9. washeluting with 0 to 40% EtOAc in hexanes

Sources & evidence

ORD record
ord-05e17778aef3428a9bc002871ea9cd72
Source dataset
uspto-grants-2012_11
Patent number
US08309718B2

Reaction notes

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