Benzyl Chloride → 1-Bromo-4-phenylmethoxybenzene

Participants

Reaction Steps

200 g (1.16 mol) of 4-bromophenol was dissolved in 2.1 L of acetone under argon. Then 320 g (2.31 mol) K2CO3 and 3.465 g (23.1 mmol) NaI were added. The mixture was stirred at room temperature and 292.7 g (2.31 mol) of benzyl chloride was added during 1hour. Then the mixture was boiled during 48 h. The acetone (ca. 500 mL) was partially removed on the rotary evaporator. 1.2 L 10% aq. Na2CO3 was added to the residue. After extraction with ethyl acetate (1×1 L+2×500 mL) the organic phase was washed with 1 L of a half-saturated NaCl solution. After drying over Na2SO4 and concentrating, the main part of the benzyl chloride was removed. 400 mL of pentane was added to the residue. The crystallisation began during stirring at 0° C. The crystals were separated and washed with 2×150 mL pentane and dried during 2 h at 15 mbar (40 °C. bath temperature) and 2 h under high vacuum at room temperature to yield 230 g (75%) 4-benzyloxybromobenzene.

Provenance & Evidence