Phosphorus tribromide → HCID 58372748, compound
Reaction equation
[CH2:1]([O:3][C:4](=[O:26])[CH2:5][C:6]1[CH:11]=[CH:10][C:9]([O:12][CH3:13])=[C:8]([O:14][C:15]2[CH:20]=[CH:19][C:18]([N+:21]([O-:23])=[O:22])=[CH:17][C:16]=2[CH2:24]O)[CH:7]=1)[CH3:2].P(Br)(Br)[Br:28]>COCCOC>[CH2:1]([O:3][C:4](=[O:26])[CH2:5][C:6]1[CH:11]=[CH:10][C:9]([O:12][CH3:13])=[C:8]([O:14][C:15]2[CH:20]=[CH:19][C:18]([N+:21]([O-:23])=[O:22])=[CH:17][C:16]=2[CH2:24][Br:28])[CH:7]=1)[CH3:2]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
To a solution of [3-(2-hydroxymethyl-4-nitro-phenoxy)-4-methoxy-phenyl]-acetic acid ethyl ester (15.14 g, 41.9 mmol) in DME was added phosphorus tribromide (5.92 mL, 62.8 mmol), and the reaction was stirred at room temperature overnight. After cooling to 0° C., the mixture was quenched with saturated aqueous NaHCO3 and extracted with EtOAc. The combined organic layers were dried over MgSO4, filtered, and concentrated to give the title compound.