Potassium Carbonate → HCID 22592126, compound

HRID 746635Notes

Reaction equation

HRID 746635 reaction equation
Br[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][C:10]([NH:12][C:13]1[C:14]([S:20][CH3:21])=[N:15][CH:16]=[CH:17][C:18]=1[CH3:19])=[O:11].[SH:22][C:23]1[O:24][C:25]2[CH:31]=[CH:30][CH:29]=[CH:28][C:26]=2[N:27]=1.C1OCCOCCOCCOCCOCCOC1.C(=O)([O-])[O-].[K+].[K+]>O.CN(C=O)C>[O:24]1[C:25]2[CH:31]=[CH:30][CH:29]=[CH:28][C:26]=2[N:27]=[C:23]1[S:22][CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][C:10]([NH:12][C:13]1[C:14]([S:20][CH3:21])=[N:15][CH:16]=[CH:17][C:18]=1[CH3:19])=[O:11]

Participants

7

Reactant 4

HCID 11430Potassium CarbonateHCID 2855718-Crown-6HCID 22592229HCID 22592229, compoundHCID 1784182821,3-benzoxazole-2-thiol

Product 1

HCID 22592126HCID 22592126, compoundYield 66%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Conditions

Temperature
80 °C

Procedure

Triethylamine (302 mg, 2.99 mmol) was added to a chloroform (4 ml) solution of this aminopyridine (307 mg, 1.99 mmol), and a chloroform (4 ml) solution of 9-bromononanyl chloride (2.99 mmol) was then slowly added thereto dropwise while being cooled with ice. The mixture was stirred at room temperature for 3 hours. The reaction mixture was diluted with water, and extracted with ethyl acetate. The organic layer was washed with water and then with a saturated aqueous solution of sodium chloride, and dried over sodium sulfate. Thereafter, the solvent was distilled off, and the resulting crude product was purified through silica gel chromatography (silica gel 125 g, eluent—hexane:ethyl acetate=3:1→2:1) to obtain 261 mg (yield 35%) of 9-bromo-N-(4-methyl-2-methylthio-3-pyridyl)nonanamide as a colorless powdery crystal (melting point: 77 to 78° C.). To a DMF (5 ml) solution of this amide (114 mg, 0.31 mmol) and 2-mercaptobenzoxazole (46 mg, 0.31 mmol) were added 18-crown-6 (8 mg, 0.03 mmol) and potassium carbonate (51 mg, 0.37 mmol), and the mixture was stirred at 80° C. for 2 hours. The reaction mixture was diluted with water, and then extracted with ethyl acetate. The organic layer was washed with water and then with a saturated aqueous solution of sodium chloride, and dried over sodium sulfate. Subsequently, the solvent was distilled off, and the resulting crude product was purified through preparative thin-layer chromatography (eluent—chloroform:methanol=20:1) to obtain 89 mg (yield 66%) of the desired compound as a colorless powdery crystal.

Workup

  1. extractionextracted with ethyl acetate
  2. washThe organic layer was washed with water
  3. dry with materialwith a saturated aqueous solution of sodium chloride, and dried over sodium sulfate
  4. distillationSubsequently, the solvent was distilled off
  5. customthe resulting crude product was purified through preparative thin-layer chromatography (eluent—chloroform:methanol=20:1)

Sources & evidence

ORD record
ord-fc9155919ae549cd9dff3d52516643e7
Source dataset
uspto-grants-2008_07
Patent number
US07393866B2

Reaction notes

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