Potassium Carbonate → 3-(9-Chloro-3-methyl-4-oxo-5H-isoxazolo[4,3-c]quinolin-5-yl)-piperidine-1-carboxylic acid benzylamide

HRID 2212198

Reaction equation

HRID 2212198 reaction equation
I.[Cl:2][C:3]1[C:4]2[C:5]3[C:6](=[C:20]([CH3:23])[O:21][N:22]=3)[C:7](=[O:19])[N:8]([CH:13]3[CH2:18][CH2:17][CH2:16][NH:15][CH2:14]3)[C:9]=2[CH:10]=[CH:11][CH:12]=1.[CH2:24]([N:31]=[C:32]=[O:33])[C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1.C(=O)([O-])[O-].[K+].[K+]>O1CCCC1>[CH2:24]([NH:31][C:32]([N:15]1[CH2:16][CH2:17][CH2:18][CH:13]([N:8]2[C:9]3[CH:10]=[CH:11][CH:12]=[C:3]([Cl:2])[C:4]=3[C:5]3=[N:22][O:21][C:20]([CH3:23])=[C:6]3[C:7]2=[O:19])[CH2:14]1)=[O:33])[C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 76639Benzyl isocyanateHCID 219637129-Chloro-3-methyl-5-piperidin-3-yl-5H-isoxazolo[4,3-c]quinolin-4-one hydroiodide

Product 1

HCID 696524153-(9-Chloro-3-methyl-4-oxo-5H-isoxazolo[4,3-c]quinolin-5-yl)-piperidine-1-carboxylic acid benzylamideYield 89.5%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a suspension of 9-chloro-3-methyl-5-piperidin-3-yl-5H-isoxazolo[4,3-c]quinolin-4-one hydroiodide (50 mg, 0.11 mmol) in tetrahydrofuran (3 mL) add benzyl isocyanate (16 μL, 0.12 mmol) and follow by potassium carbonate (23 mg, 0.17). Stir the mixture at room temperature under nitrogen overnight. concentrate the mixture, partition between 20% isopropanol/chloroform and water, and separate. Wash the organic layer with saturated aqueous sodium bicarbonate solution, brine, dry over magnesium sulfate and concentrate. Purify by flash chromatography on silica gel (eluting with 0–0.5% methanol/chloroform) to give 44.4 mg of the title compound as an orange solid, 88% yield. 1H NMR: consistent with structure. MS (ion spray) 451 (M+).

Workup

  1. concentrationconcentrate the mixture
  2. custompartition between 20% isopropanol/chloroform and water
  3. customseparate
  4. washWash the organic layer with saturated aqueous sodium bicarbonate solution, brine
  5. dry with materialdry over magnesium sulfate
  6. concentrationconcentrate
  7. customPurify by flash chromatography on silica gel (eluting with 0–0.5% methanol/chloroform)

Sources & evidence

ORD record
ord-184b0e13f5384e9db8be023ae7358daf
Source dataset
uspto-grants-2006_09
Patent number
US07101891B2

Linked notes

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