Sodium borohydride → HCID 54050151, compound

HRID 2256888Notes

Reaction equation

HRID 2256888 reaction equation
[N+:1]([C:4]1[CH:19]=[C:18]([C:20]([F:23])([F:22])[F:21])[CH:17]=[CH:16][C:5]=1[C:6]([C:8]1[CH:9]=[N:10][O:11][C:12]=1[CH:13]1[CH2:15][CH2:14]1)=[O:7])([O-:3])=[O:2].[BH4-].[Na+]>C(O)C>[OH:7][CH:6]([C:5]1[CH:16]=[CH:17][C:18]([C:20]([F:22])([F:21])[F:23])=[CH:19][C:4]=1[N+:1]([O-:3])=[O:2])[C:8]1[CH:9]=[N:10][O:11][C:12]=1[CH:13]1[CH2:15][CH2:14]1

Participants

4

Reactant 2

HCID 4311764Sodium borohydrideHCID 54345374HCID 54345374, compound

Product 1

HCID 54050151HCID 54050151, compoundYield 73.9%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

A mixture of 4-[2-nitro-4-trifluoromethylbenzoyl]-5-cyclopropylisoxazole (8.00 g) and sodium borohydride (0.53 g) in ethanol (250 ml) was stirred at room temperature for 2 hours. The solution was evaporated almost to dryness and the resultant solution was diluted with ethyl acetate. The solution was washed with water, dried (anhydrous magnesium sulphate) and filtered. The filtrate was evaporated to dryness. The residue was purified by chromatography on silica eluted with a mixture of ether and petroleum ether to give 4-[hydroxy-(2-nitro4-trifluoromethylphenyl) methyl]-5-cyclopropylisoxazole (compound 294, 5.95 g) as an off white solid: m.p. 76° C.

Workup

  1. customThe solution was evaporated almost to dryness
  2. additionthe resultant solution was diluted with ethyl acetate
  3. washThe solution was washed with water
  4. dry with materialdried (anhydrous magnesium sulphate)
  5. filtrationfiltered
  6. customThe filtrate was evaporated to dryness
  7. customThe residue was purified by chromatography on silica
  8. washeluted with a mixture of ether and petroleum ether

Sources & evidence

ORD record
ord-6de3d330ffd6409db38e6dce5d022df6
Source dataset
uspto-grants-1997_08
Patent number
US05656573

Reaction notes

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