Carbon tetrabromide → 1,1'-Biphenyl, 4-(bromomethyl)-

HRID 1297252Notes

Reaction equation

HRID 1297252 reaction equation
[C:1]([Br:5])(Br)(Br)Br.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[C:25]1([C:33]2[CH:38]=[CH:37][CH:36]=[CH:35][CH:34]=2)[CH:30]=[CH:29][C:28](CO)=[CH:27][CH:26]=1>ClCCl>[Br:5][CH2:1][C:36]1[CH:37]=[CH:38][C:33]([C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)=[CH:34][CH:35]=1

Participants

5

Reactant 3

HCID 11205Carbon tetrabromideHCID 11776TriphenylphosphineHCID 19186(1,1'-Biphenyl)-4-methanol

Product 1

HCID 2577161,1'-Biphenyl, 4-(bromomethyl)-Yield 95.1%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

Carbon tetrabromide (8.99 g, 27.1 mmol) and triphenyl phosphine (7.11 g, 27.1 mmol) were added to a stirred solution of biphenyl-4-yl methanol (5.00 g, 27.1 mmol) in dichloromethane (100 mL) at room temperature. Stirring was continued at room temperature for 1.5 hours then the solvent removed by evaporation under reduced pressure. The residue was purified by column chromatography on silica gel (1:20 diethyl ether:cyclohexane) to give the title compound (6.37 g, 95%) as a white solid. 1H NMR (400 MHz: CDCl3): 7.6 (4 H), 7.45 (4 H), 7.35 (1 H), 4.55 (2 H).

Workup

  1. customthe solvent removed by evaporation under reduced pressure
  2. customThe residue was purified by column chromatography on silica gel (1:20 diethyl ether:cyclohexane)

Sources & evidence

ORD record
ord-434b5ff708154877b1f698f11c7d8ee1
Source dataset
uspto-grants-2007_07
Patent number
US07250439B2

Reaction notes

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