Sodium hydride → 6-(1-Methyl-1H-1,2,4-triazol-3-ylmethoxy)-7-phenyl-3-(pyrazin-2-yl)-1,2,4-triazolo[4,3-b]pyridazine

HRID 378835Notes

Reaction equation

HRID 378835 reaction equation
[CH3:1][N:2]1[CH:6]=[N:5][C:4]([CH2:7][OH:8])=[N:3]1.[H-].[Na+].Cl[C:12]1[C:13]([C:27]2[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=2)=[CH:14][C:15]2[N:16]([C:18]([C:21]3[CH:26]=[N:25][CH:24]=[CH:23][N:22]=3)=[N:19][N:20]=2)[N:17]=1>CN(C)C=O>[CH3:1][N:2]1[CH:6]=[N:5][C:4]([CH2:7][O:8][C:12]2[C:13]([C:27]3[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=3)=[CH:14][C:15]3[N:16]([C:18]([C:21]4[CH:26]=[N:25][CH:24]=[CH:23][N:22]=4)=[N:19][N:20]=3)[N:17]=2)=[N:3]1

Participants

5

Reactant 3

HCID 24758Sodium hydrideHCID 10351670(1-Methyl-1H-1,2,4-triazol-3-yl)methanolHCID 184306846-Chloro-7-phenyl-3-(pyrazin-2-yl)-1,2,4-triazolo[4,3-b]pyridazine

Product 1

HCID 98214886-(1-Methyl-1H-1,2,4-triazol-3-ylmethoxy)-7-phenyl-3-(pyrazin-2-yl)-1,2,4-triazolo[4,3-b]pyridazine

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of (1-methyl-1H-1,2,4-triazol-3-yl)methanol (prepared using the conditions described in EP-A-421210; 0.044 g, 0.39 mmol) in dimethyl formamide (10 ml) was added sodium hydride (0.016 g of a 60% dispersion in oil, 0.390 mmol) and the reaction mixture was stirred at room temperature under nitrogen for 0.5 h. After this time, the product from Example 1 step e) (0.1 g, 0.325 mmol) was added and the reaction mixture stirred for 2.5 h. The solvent was removed under high vacuum. Water (5 ml) was added to the residue and the solid produced was collected by filtration. The solid was recrystallised from ethyl acetate/ethanol to give the required product (0.049 g, m.p. 256.9-257.8° C.). 1H NMR (360 MHz, CDCl3) δ 3.94 (3H, s), 5.62 (2H, s), 7.47 (3H, m), 7.67 (2H, m), 8.04 (1H, s), 8.10 (1H, s), 870 (1H, s), 8.84 (1H, s), 9.80 (1H, s) MS (ES+) m/e 386 [MH+].

Workup

  1. stirringthe reaction mixture stirred for 2.5 h
  2. customThe solvent was removed under high vacuum
  3. additionWater (5 ml) was added to the residue
  4. customthe solid produced
  5. filtrationwas collected by filtration
  6. customThe solid was recrystallised from ethyl acetate/ethanol

Sources & evidence

ORD record
ord-169abdb44ae9438caf3f54eb4b0eecdd
Source dataset
uspto-grants-2001_10
Patent number
US06297235B1

Reaction notes

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