Phosphorus oxychloride → 7-(Benzyloxy)-4-chloro-3-nitroquinoline

HRID 1364058Notes

Reaction equation

HRID 1364058 reaction equation
P(Cl)(Cl)([Cl:3])=O.[CH2:6]([O:13][C:14]1[CH:23]=[C:22]2[C:17]([C:18](O)=[C:19]([N+:24]([O-:26])=[O:25])[CH:20]=[N:21]2)=[CH:16][CH:15]=1)[C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1>CN(C=O)C.ClCCl>[CH2:6]([O:13][C:14]1[CH:23]=[C:22]2[C:17]([C:18]([Cl:3])=[C:19]([N+:24]([O-:26])=[O:25])[CH:20]=[N:21]2)=[CH:16][CH:15]=1)[C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1

Participants

5

Reactant 2

HCID 24813Phosphorus oxychlorideHCID 178526778HCID 178526778, compound

Product 1

HCID 210757517-(Benzyloxy)-4-chloro-3-nitroquinolineYield 94.2%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolvent2×HCID 6344DichloromethaneSolvent

Conditions

Temperature
100 °C

Procedure

DMF (100 mL) was cooled to 0° C., and phosphorous oxychloride (27.5 mL, 0.295 mol) was added dropwise. The resulting solution was stirred for 25 minutes and then added dropwise to a mixture of 7-benzyloxy-3-nitroquinolin-4-ol (72.87 g, 0.2459 mol) in DMF (400 mL). Following the addition, the reaction was heated at 100° C. for 5 minutes, cooled to ambient temperature, and poured into ice water with stirring. A tan precipitate formed, which was isolated by filtration and dissolved in dichloromethane. The resulting solution was dried over magnesium sulfate, filtered, and concentrated under reduced pressure to yield 72.9 g of 7-benzyloxy-4-chloro-3-nitroquinoline as a light brown solid.

Workup

  1. additionthe addition
  2. temperaturecooled to ambient temperature
  3. stirringwith stirring
  4. customA tan precipitate formed
  5. customwhich was isolated by filtration
  6. dry with materialThe resulting solution was dried over magnesium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-889df33df26b4c90a2338f5f7824233d
Source dataset
uspto-grants-2011_02
Patent number
US07888349B2

Reaction notes

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