Bromobenzene → 4-(1-Oxo-4-methyl-pentyl) bromobenzene
반응식
[CH3:1][CH:2]([CH3:8])[CH2:3][CH2:4][C:5]([OH:7])=O.S(Cl)(Cl)=O.[Br:13][C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1.[Cl-].[Al+3].[Cl-].[Cl-]>>[O:7]=[C:5]([C:17]1[CH:18]=[CH:19][C:14]([Br:13])=[CH:15][CH:16]=1)[CH2:4][CH2:3][CH:2]([CH3:1])[CH3:8]참가 물질
5
실험 절차
A mixture of 25 g (0.215 mol) of 4-methyl valeric acid and 29.35 g (0.247 mol) of thionyl chloride was heated at reflux for 1.5 hour. The excess thionyl chloride was removed under reduced pressure using a cryogenic trap. The residue was taken up with 120 g (0.764 mol) of bromobenzene (Compound 27) and the mixture was cooled in an ice-bath and then treated with 23 g (0.172 mol) of anhydrous aluminum chloride through a powder addition funnel. The mixture was stirred at room temperature for 82 h and then quenched by the addition of 50 ml of an ice/water mixture, followed by 30 ml of conc. HCl. The organic layer was separated and the aqueous layer extracted with 2×50 ml of ether. The organic extracts were combined and washed successively with water and saturated NaCl solution and then dried (MgSO4). The solvent was then removed in-vacuo and the residue purified by distillation (~80 degrees C./0.01 mm) to give the title compound as a colorless solid. PMR (CDCl3): & 0.94 (6H, d, J~6.0 Hz), 1.53-1.68 (3H, m), 2.85-2.97 (2H, m)., 7.60 (2H, d, J~8.4 Hz), 7.83 (2H, d, J~8.4 Hz).