Bromine → (S)-(+)-5-Bromo-2-(2-methylbutyloxy)benzonitrile
Reaction equation
[CH3:1][C@@H:2]([CH2:13][CH3:14])[CH2:3][O:4][C:5]1[CH:12]=[CH:11][CH:10]=[CH:9][C:6]=1[C:7]#[N:8].[Br:15]Br>C(Cl)(Cl)Cl>[Br:15][C:10]1[CH:11]=[CH:12][C:5]([O:4][CH2:3][C@@H:2]([CH3:1])[CH2:13][CH3:14])=[C:6]([CH:9]=1)[C:7]#[N:8]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
A mixture of compound 39 (4.25 g, 0.022 mol), bromine (12.31 g, 0.077 mol) and chloroform (50 ml) was heated under reflux overnight. A further portion of bromine (12.31 g, 0.077 mol) was then added and heating continued for another 24 h. The resultant solution was washed with a saturated solution of sodium thiosulphate and finally with water. The dichloromethane solution was dried (MgSO4) and evaporated in vacuo and the crude oil was purified by column chromatography (10% petrol/dichloromethane) to yield a fawn oil.