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

HRID 856344Notes

Reaction equation

HRID 856344 reaction equation
[CH3:1][C@@:2]1([CH2:13][N:14]2[CH2:19][CH2:18][N:17]([N:20]=[CH:21][C:22]3[CH:27]=[CH:26][C:25]([C:28]([F:31])([F:30])[F:29])=[CH:24][CH:23]=3)[CH2:16][CH2:15]2)[O:6][C:5]2=[N:7][C:8]([N+:10]([O-:12])=[O:11])=[CH:9][N:4]2[CH2:3]1.C1COCC1.[BH4-].[Na+]>CO>[CH3:1][C@@:2]1([CH2:13][N:14]2[CH2:15][CH2:16][N:17]([NH:20][CH2:21][C:22]3[CH:27]=[CH:26][C:25]([C:28]([F:31])([F:29])[F:30])=[CH:24][CH:23]=3)[CH2:18][CH2:19]2)[O:6][C:5]2=[N:7][C:8]([N+:10]([O-:12])=[O:11])=[CH:9][N:4]2[CH2:3]1

Participants

5

Reactant 3

HCID 8028TetrahydrofuranHCID 4311764Sodium borohydrideHCID 66887963(S)-N-[4-(2-methyl-6-nitro-2,3-dihydroimidazo[2,1-b]oxazol-2-ylmethyl)piperazin-1-yl]-N-(4-trifluoromethylbenzylidene)amine

Product 1

HCID 69481419(S)-N-[4-(2-methyl-6-nitro-2,3-dihydroimidazo[2,1-b]oxazol-2-ylmethyl)piperazin-1-yl]-N-(4-trifluoromethylbenzyl)amineYield 31.6%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To a mixture of (S)-N-[4-(2-methyl-6-nitro-2,3-dihydroimidazo[2,1-b]oxazol-2-ylmethyl)piperazin-1-yl]-N-(4-trifluoromethylbenzylidene)amine prepared in Example 504 (100 mg, 0.23 mmol) and THF (4 ml), sodium borohydride (13 mg, 0.34 mmol) was added with cooling on ice-bath followed by stirring at room temperature for 30 minutes. To the reaction mixture, methanol (1 ml) was added, and the solution was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (n-hexane/ethyl acetate=2/1) to afford (S)-N-[4-(2-methyl-6-nitro-2,3-dihydroimidazo[2,1-b]oxazol-2-ylmethyl)piperazin-1-yl]-N-(4-trifluoromethylbenzyl)amine (32 mg, yield 31%) as a light yellow powder.

Workup

  1. additionwas added
  2. temperaturewith cooling on ice-bath
  3. concentrationthe solution was concentrated under reduced pressure
  4. customThe residue was purified by silica gel column chromatography (n-hexane/ethyl acetate=2/1)

Sources & evidence

ORD record
ord-735e6f42c03d4daea6b86fd19a73fed4
Source dataset
uspto-grants-2007_08
Patent number
US07262212B2

Reaction notes

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