Phosphorus oxybromide → HCID 59234241, compound

HRID 2176840Notes

Reaction equation

HRID 2176840 reaction equation
[CH2:1]([N:5]1[CH:10]=[CH:9][C:8](O)=[C:7]([C:12]#[N:13])[C:6]1=[O:14])[CH2:2][CH2:3][CH3:4].P(Br)(Br)([Br:17])=O>CN(C=O)C>[Br:17][C:8]1[CH:9]=[CH:10][N:5]([CH2:1][CH2:2][CH2:3][CH3:4])[C:6](=[O:14])[C:7]=1[C:12]#[N:13]

Participants

4

Reactant 2

HCID 24613Phosphorus oxybromideHCID 59234228HCID 59234228, compound

Product 1

HCID 59234241HCID 59234241, compoundYield 72%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
110 °C

Procedure

To a solution of intermediate 4 (39 g, 203 mmol) in DMF (600 ml) was added phosphoric tribromide (116 g, 406 mmol) and the mixture was heated at 110° C. for 1.5 hours. After cooling in an ice bath the solution was partitioned between water and EtOAc. After three extractions with EtOAc the combined organic fractions were washed with brine, dried over Na2SO4 and the solvent evaporated in vacuo. The crude product was purified by column chromatography (silica gel; DCM as eluent). The desired fractions were collected and evaporated in vacuo to yield intermediate 6 (36.7 g, 72%).

Workup

  1. temperatureAfter cooling in an ice bath the solution
  2. customwas partitioned between water and EtOAc
  3. extractionAfter three extractions with EtOAc the combined organic fractions
  4. washwere washed with brine
  5. dry with materialdried over Na2SO4
  6. customthe solvent evaporated in vacuo
  7. customThe crude product was purified by column chromatography (silica gel; DCM as eluent)
  8. customThe desired fractions were collected
  9. customevaporated in vacuo

Sources & evidence

ORD record
ord-5dc1aa5784b24d549d7dec8932bea11a
Source dataset
uspto-grants-2015_06
Patent number
US09067891B2

Reaction notes

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