Phosphorus oxybromide → HCID 86595467, compound

HRID 2253095Notes

Reaction equation

HRID 2253095 reaction equation
[CH2:1]([O:5][C:6]([C:8]1[N:9]=[C:10](O)[C:11]2[C:16]([C:17]=1[OH:18])=[CH:15][CH:14]=[C:13]([O:19][CH:20]1[CH2:25][CH2:24][CH2:23][CH2:22][CH2:21]1)[CH:12]=2)=[O:7])[CH2:2][CH2:3][CH3:4].P(Br)(Br)([Br:29])=O>C1(C)C=CC=CC=1>[CH2:1]([O:5][C:6]([C:8]1[N:9]=[C:10]([Br:29])[C:11]2[C:16]([C:17]=1[OH:18])=[CH:15][CH:14]=[C:13]([O:19][CH:20]1[CH2:25][CH2:24][CH2:23][CH2:22][CH2:21]1)[CH:12]=2)=[O:7])[CH2:2][CH2:3][CH3:4]

Participants

4

Reactant 2

HCID 24613Phosphorus oxybromideHCID 178450857HCID 178450857, compound

Product 1

HCID 86595467HCID 86595467, compoundYield 78.6%

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent

Procedure

A mixture of 7-cyclohexyloxy-1,4-dihydroxy-isoquinoline-3-carboxylic acid butyl ester (Compound A-74 c1) (1.3 g) and phosphorus oxybromide (1.35 g) in anhydrous toluene (25 ml) was heated in a microwave reactor (sealed tube) at 130° C. for 15 min. After cooling, reaction mixture was concentrated. The residue was treated with saturated sodium bicarbonate aqueous solution (100 ml) and stirred at room temperature for 20 min. Extracted with ethyl acetate. Organic layer was washed with water, brine, dried over magnesium sulfate, filtered, and concentrated to give the title compound (1.2 g). MS-(+)-ion M+1=422.12, 424.12.

Workup

  1. temperaturewas heated in a microwave reactor
  2. custom(sealed tube) at 130° C. for 15 min
  3. temperatureAfter cooling
  4. customreaction mixture
  5. concentrationwas concentrated
  6. additionThe residue was treated with saturated sodium bicarbonate aqueous solution (100 ml)
  7. extractionExtracted with ethyl acetate
  8. washOrganic layer was washed with water, brine
  9. dry with materialdried over magnesium sulfate
  10. filtrationfiltered
  11. concentrationconcentrated

Sources & evidence

ORD record
ord-85bdcbb051404b849827c605faa14b7a
Source dataset
uspto-grants-2008_01
Patent number
US07323475B2

Reaction notes

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