2-bromo-4-methylpentane

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 10 g (35 mmol) of 2,4-dihydroxy-5-(1,1-dimethylpropyl)benzophenone, 11 g (66 mmol) of 2-bromo-4-methylpentane and 9.7 g (70 mmol) of potassium carbonate in 50 ml of xylene and 20 ml of N,N-dimethylacetamide is heated with stirring and held at 125° C. for 6 h. The reaction mixture is cooled, then treated with 30 ml of water and extracted with ethyl acetate. The resulting solution is washed with water and then with saturated sodium chloride solution. The residue which remains after drying over MgSO4, filtering and concentrating by evaporation is distilled in a bulb tube (200° C./0. 1 mbar). 11.2 g (86.4%) of the compound are obtained as a yellow liquid. is heated The reaction mixture is cooled extracted with ethyl acetate The resulting solution is washed with water after drying over MgSO4 filtering concentrating by evaporation is distilled in a bulb tube (200° C./0. 1 mbar)