反应详情

To a solution of 1.50 g (5.9 mmole) 4-hydroxy-3-(1-phenyl-vinyl)-benzoic acid methylester and 1.04 g (6.1 mmole) benzyl bromide in 10 ml abs. acetone 1.24 g (8.9 mmole) potassium carbonate are added. The reaction mixture is then heated for 4 hours with recycling. Following cooling of the suspension, it is filtered and the residue is washed with 50 ml diethtylether. The solvent is removed and the raw product obtained is cleaned by column chromatography (silica gel, petroleum ether/MTBE=5/1 (v/v)). 1.62 g (4.7 mmole, 80%) 4-benzyloxy-3-(1-phenyl-vinyl)-benzoic acid-methylester are obtained.

1. temperatureThe reaction mixture is then heated for 4 hours
2. temperatureFollowing cooling of the suspension, it
3. filtrationis filtered
4. washthe residue is washed with 50 ml diethtylether
5. customThe solvent is removed
6. customthe raw product obtained