反应详情

To (5-trifluoromethyl-pyridin-2-yl)-methanol (1.65 g) in dichloromethane (20 ml) at 0° C. (ice-bath) under nitrogen was added triphenylphosphine (3.66 g, 13.98 mmol) in portions, followed by addition of carbon tetrabromide (3.23 g) in portions. The ice-bath was removed and the flask was sealed with a glass stopper. The reaction mixture was gently stirred for 1 hour. The crude reaction mixture was loaded onto a silica gel column (120 g), and eluted with methyl acetate/hexane to give 2-bromomethyl-5-trifluoromethyl-pyridine as a light orange oil (1.65 g, 73%).

1. customThe ice-bath was removed
2. customthe flask was sealed with a glass stopper
3. customThe crude reaction mixture
4. washeluted with methyl acetate/hexane