Triphenylphosphine → 1-Bromo-3-(bromomethyl)-5-nitrobenzene

HRID 391451

Reaction equation

HRID 391451 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]([CH2:11]O)[CH:5]=[C:6]([N+:8]([O-:10])=[O:9])[CH:7]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[Br:32]N1C(=O)CCC1=O>O1CCCC1.C(OCC)(=O)C>[Br:1][C:2]1[CH:7]=[C:6]([N+:8]([O-:10])=[O:9])[CH:5]=[C:4]([CH2:11][Br:32])[CH:3]=1

Participants

6

Reactant 3

HCID 11776TriphenylphosphineHCID 67184N-bromobutanimideHCID 14866972(3-Bromo-5-nitrophenyl)methanol

Product 1

HCID 148669731-Bromo-3-(bromomethyl)-5-nitrobenzene

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
0 °C

Procedure

(3-Bromo-5-nitrophenyl)methanol (2.0 g, 8.65 mmol) and triphenylphosphine (4.5 g, 17.3 mmol) were combined in tetrahydrofuran (40 mL) and cooled to 0° C. N-Bromosuccinimide (3.2 g, 18.2 mmol) was introduced in portions and the reaction allowed to warm to room temperature. After 16 h, the reaction mixture was diluted with ethyl acetate, washed with concentrated sodium bicarbonate (2×), brine (2×), dried over sodium sulfate, and concentrated. Column chromatography on silica gel (5% ethyl acetate/hexanes) gave 2.2 g (84%) as a white powder. 1H-NMR (CDCl3, 300 MHz) 8.27 (s, 1H), 8.16 (s, 1H), 7.84 (s, 1H), 4.45 (s, 2H).

Workup

  1. temperatureto warm to room temperature
  2. washwashed with concentrated sodium bicarbonate (2×), brine (2×)
  3. dry with materialdried over sodium sulfate
  4. concentrationconcentrated
  5. customColumn chromatography on silica gel (5% ethyl acetate/hexanes) gave 2.2 g (84%) as a white powder

Sources & evidence

ORD record
ord-036a52c95d9b42dea2d4a95452bfd532
Source dataset
uspto-grants-2013_02
Patent number
US08383821B2

Linked notes

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