Sodium hydride → 6-[3-[4-(Diphenylmethoxy)piperidino]propoxy]-2-methyl[1,2,4]triazolo[4,3-b]pyridazin-3(2H)-one

HRID 397575Notes

Reaction equation

HRID 397575 reaction equation
[C:1]1([CH:7]([C:19]2[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=2)[O:8][CH:9]2[CH2:14][CH2:13][N:12]([CH2:15][CH2:16][CH2:17][OH:18])[CH2:11][CH2:10]2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[H-].[Na+].Cl[C:28]1[CH:29]=[CH:30][C:31]2[N:32]([C:34](=[O:38])[N:35]([CH3:37])[N:36]=2)[N:33]=1>CN(C)C=O>[C:19]1([CH:7]([C:1]2[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=2)[O:8][CH:9]2[CH2:14][CH2:13][N:12]([CH2:15][CH2:16][CH2:17][O:18][C:28]3[CH:29]=[CH:30][C:31]4[N:32]([C:34](=[O:38])[N:35]([CH3:37])[N:36]=4)[N:33]=3)[CH2:11][CH2:10]2)[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1

Participants

5

Reactant 3

HCID 24758Sodium hydrideHCID 229892644-(Diphenylmethoxy)piperidinepropanolHCID 230003286-chloro-2-methyl[1,2,4]triazolo[4,3-b]pyridazin-3(2H)-one

Product 1

HCID 230002996-[3-[4-(Diphenylmethoxy)piperidino]propoxy]-2-methyl[1,2,4]triazolo[4,3-b]pyridazin-3(2H)-oneYield 66.3%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

0.52 g of 4-(diphenylmethoxy)-1-piperidinepropanol was dissolved in 3 ml of N,N-dimethylformamide; 0.0704 g of 60% oily sodium hydride was added, followed by stirring at room temperature for 1 hour. 0.325 g of 6-chloro-2-methyl[1,2,4]triazolo[4,3-b]pyridazin-3(2H)-one was added, followed by stirring at room temperature for 2 hours. After ice water was added, the reaction mixture was extracted with ethyl acetate; the extract was washed with saturated saline and dried over magnesium sulfate. After concentration under reduced pressure, the residue was subjected to silica gel column chromatography and eluted with ethyl acetate-methanol-triethylamine (90:10:1). The desired fraction was collected and concentrated; the crystal obtained was filtered, washed with diethyl ether, and dried, to yield 0.502 g of the title compound.

Workup

  1. stirringby stirring at room temperature for 2 hours
  2. extractionthe reaction mixture was extracted with ethyl acetate
  3. washthe extract was washed with saturated saline
  4. dry with materialdried over magnesium sulfate
  5. concentrationAfter concentration under reduced pressure
  6. washeluted with ethyl acetate-methanol-triethylamine (90:10:1)
  7. customThe desired fraction was collected
  8. concentrationconcentrated
  9. customthe crystal obtained
  10. filtrationwas filtered
  11. washwashed with diethyl ether
  12. customdried

Sources & evidence

ORD record
ord-3a3e4ddff81d4366ae11a2b5bc130276
Source dataset
uspto-grants-2003_08
Patent number
US06610694B1

Reaction notes

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