Dimethyl Sulfoxide → 1-Bromo-4-(2-nitroethyl)benzene

HRID 1891948Notes

Reaction equation

HRID 1891948 reaction equation
[Br:1][C:2]1[CH:7]=[CH:6][C:5](/[CH:8]=[CH:9]/[N+:10]([O-:12])=[O:11])=[CH:4][CH:3]=1.CS(C)=O.[BH4-].[Na+]>C(O)(=O)C>[Br:1][C:2]1[CH:3]=[CH:4][C:5]([CH2:8][CH2:9][N+:10]([O-:12])=[O:11])=[CH:6][CH:7]=1

Participants

5

Reactant 3

HCID 679Dimethyl SulfoxideHCID 688204trans-4-Bromo-beta-nitrostyreneHCID 4311764Sodium borohydride

Product 1

HCID 111838091-Bromo-4-(2-nitroethyl)benzeneYield 94.3%

Reagents, catalysts & solvents 1

HCID 176Acetic AcidSolvent

Procedure

To a solution of 1-bromo-4-((E)-2-nitro-vinyl)-benzene (1 g, 4.37 mmol) described in Manufacturing Example 207-1-1 in acetic acid (0.6 mL) and dimethyl sulfoxide (10 mL) was added sodium borohydride (265 mg, 6.99 mmol), which was stirred for 30 minutes at room temperature. The mixture was cooled with ice water and partitioned into ethyl acetate and water. The organic layer was separated, washed with water, dried over anhydrous magnesium sulfate, and filtered. The filtrate was concentrated under a reduced pressure to obtain the title compound (948 mg). The title compound was used in the following reaction without any further purification.

Workup

  1. custompartitioned into ethyl acetate and water
  2. customThe organic layer was separated
  3. washwashed with water
  4. dry with materialdried over anhydrous magnesium sulfate
  5. filtrationfiltered
  6. concentrationThe filtrate was concentrated under a reduced pressure

Sources & evidence

ORD record
ord-1c8aa05d56dc4fc1918664b2e5de7aa9
Source dataset
uspto-grants-2013_08
Patent number
US08507530B2

Reaction notes

Loading…