Phosphorus oxychloride → HCID 86617087, compound

HRID 2077242Notes

Reaction equation

HRID 2077242 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][C:14]([O:19][C:20]1[CH:29]=[CH:28][C:23]3[N:24]=[C:25]([CH3:27])[O:26][C:22]=3[CH:21]=1)=[CH:13][CH:12]=2)=[O:7])[CH2:2][CH2:3][CH3:4].C(OC(C1N=C(O)C2C(C=1O)=CC=C(OC1C=CC3N=C(C)OC=3C=1)C=2)=O)CCC.P(Cl)(Cl)([Cl:63])=O.C(=O)(O)[O-].[Na+]>ClC(Cl)C>[CH2:1]([O:5][C:6]([C:8]1[N:9]=[C:10]([Cl:63])[C:11]2[C:16]([C:17]=1[OH:18])=[CH:15][C:14]([O:19][C:20]1[CH:29]=[CH:28][C:23]3[N:24]=[C:25]([CH3:27])[O:26][C:22]=3[CH:21]=1)=[CH:13][CH:12]=2)=[O:7])[CH2:2][CH2:3][CH3:4]

Participants

6

Reactant 4

HCID 24813Phosphorus oxychlorideHCID 516892Sodium BicarbonateHCID 178450846HCID 178450846, compoundHCID 178450854HCID 178450854, compound

Product 1

HCID 86617087HCID 86617087, compound

Reagents, catalysts & solvents 1

HCID 63651,1-DichloroethaneSolvent

Conditions

Temperature
120 °C

Procedure

A solution of the regiosomeric mixture of 1,4-dihydroxy-6-(2-methyl-benzooxazol-6-yloxy)-isoquinoline-3-carboxylic acid butyl ester and 1,4-dihydroxy-7-(2-methyl-benzooxazol-6-yloxy)-isoquinoline-3-carboxylic acid butyl ester synthesized as described above (2.5 g, 6.12 mmol), and phosphorus oxychloride (685 μL, 7.35 mmol) in dichloroethane (30 mL) was stirred at 120° C. in a CEM microwave apparatus for thirty minutes. The mixture was stirred at ambient temperature with a saturated sodium bicarbonate solution for thirty minutes. The organic layer was washed with brine, dried over anhydrous sodium sulfate, concentrated in vacuo and the residue was purified by flash column chromatography on silica gel with a gradient of ethyl acetate and dichloromethane to give a solid (1.72 g). It was recrystallized from ethyl acetate (130 mL) to give the title compound as a white solid (844 mg): MS: (+) m/z 427.16 (M+1).

Workup

  1. customsynthesized
  2. washThe organic layer was washed with brine
  3. dry with materialdried over anhydrous sodium sulfate
  4. concentrationconcentrated in vacuo
  5. customthe residue was purified by flash column chromatography on silica gel with a gradient of ethyl acetate and dichloromethane

Sources & evidence

ORD record
ord-f2726647a7b142f0aa914754ceb1c90e
Source dataset
uspto-grants-2011_04
Patent number
US07928120B2

Reaction notes

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