Boron tribromide → HCID 22285658, compound
Reaction equation
[CH:1]1([N:5]([CH3:28])[C:6](=[O:27])[C:7]2[CH:12]=[C:11]([O:13][C:14]3[C:19]([Cl:20])=[CH:18][C:17]([CH2:21]OC)=[CH:16][C:15]=3[Cl:24])[CH:10]=[CH:9][C:8]=2[O:25]C)[CH2:4][CH2:3][CH2:2]1.B(Br)(Br)[Br:30]>ClCCl>[Br:30][CH2:21][C:17]1[CH:18]=[C:19]([Cl:20])[C:14]([O:13][C:11]2[CH:10]=[CH:9][C:8]([OH:25])=[C:7]([CH:12]=2)[C:6]([N:5]([CH:1]2[CH2:4][CH2:3][CH2:2]2)[CH3:28])=[O:27])=[C:15]([Cl:24])[CH:16]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
To a solution of the title compound of Step F in dichloromethane (2.2 ml) at room temperature was added boron tribromide (1M in dichloromethane, 1.5 ml, 1.5 mmol). The reaction mixture was stirred at room temperature for about two hours, and quenched with water (20 ml). After stirring for about 15 minutes, the solution was extracted with dichloromethane (3×15 ml). The combined organic extracts were washed with brine (50 ml), treated with activated carbon, filtered through diatomaceous earth, dried and concentrated to give the title compound (163 mg) as an off-white solid which was used in the next step without further purification. MS (APCI−) Calc: 457.0, found: 456.0 (M−1).