Dimethylformamide → (S)-N-[4-(2-methyl-6-nitro-2,3-dihydroimidazo[2,1-b]oxazol-2-ylmethyl)piperazin-1-yl]-N-(4-trifluoromethylbenzylidene)amine

HRID 856341Notes

Reaction equation

HRID 856341 reaction equation
Cl[C:2]1[N:3]([CH2:10][C@@:11]([CH3:32])([OH:31])[CH2:12][N:13]2[CH2:18][CH2:17][N:16]([N:19]=[CH:20][C:21]3[CH:26]=[CH:25][C:24]([C:27]([F:30])([F:29])[F:28])=[CH:23][CH:22]=3)[CH2:15][CH2:14]2)[CH:4]=[C:5]([N+:7]([O-:9])=[O:8])[N:6]=1.CN(C=O)C.[H-].[Na+]>O>[CH3:32][C@@:11]1([CH2:12][N:13]2[CH2:18][CH2:17][N:16]([N:19]=[CH:20][C:21]3[CH:26]=[CH:25][C:24]([C:27]([F:30])([F:29])[F:28])=[CH:23][CH:22]=3)[CH2:15][CH2:14]2)[O:31][C:2]2=[N:6][C:5]([N+:7]([O-:9])=[O:8])=[CH:4][N:3]2[CH2:10]1

Participants

5

Reactant 3

HCID 6228DimethylformamideHCID 24758Sodium hydrideHCID 69481568(S)-1-(2-chloro-4-nitroimidazol-1-yl)-2-methyl-3-{4-[(4-trifluoromethylbenzylidene)amino]piperazin-1-yl}propan-2-ol

Product 1

HCID 66887963(S)-N-[4-(2-methyl-6-nitro-2,3-dihydroimidazo[2,1-b]oxazol-2-ylmethyl)piperazin-1-yl]-N-(4-trifluoromethylbenzylidene)amineYield 69%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

To a mixture of (S)-1-(2-chloro-4-nitroimidazol-1-yl)-2-methyl-3-{4-[(4-trifluoromethylbenzylidene)amino]piperazin-1-yl}propan-2-ol prepared in Example 496 (847 mg, 0.85 mmol) and DMF (4 ml), sodium hydride (69 mg, 1.73 mmol) was added followed by stirring for 2.5 hours with cooling on ice-bath. To the reaction mixture, water was added, and the precipitates were filtered off. The resulting solid was washed with methanol and recrystallized from acetone/water to afford (S)-N-[4-(2-methyl-6-nitro-2,3-dihydroimidazo[2,1-b]oxazol-2-ylmethyl)piperazin-1-yl]-N-(4-trifluoromethylbenzylidene)amine (248 mg, yield 69%) as a light yellow powder.

Workup

  1. additionwas added
  2. temperaturewith cooling on ice-bath
  3. filtrationthe precipitates were filtered off
  4. washThe resulting solid was washed with methanol
  5. customrecrystallized from acetone/water

Sources & evidence

ORD record
ord-2020ec2405734c45a3e6552a84834b81
Source dataset
uspto-grants-2007_08
Patent number
US07262212B2

Reaction notes

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