反应详情

A cooled (5° C.) solution of (±)-3-(2-benzyloxy-5-bromophenyl)-3-phenylpropan-1-ol (103.0 g) in dichloromethane (300 ml) was treated with pyridine (79.4 ml) and then p-toluenesulphonyl chloride (60.6 g) in dichloromethane (200 ml). After 18 hrs. at room temperature the solvent was removed in vacuum and the residue was extracted with diethyl ether. The extract was washed with hydrochloric acid, water, and dried over anhydrous sodium sulphate to give (±)-toluene-4-sulphonic acid 3-(2-benzyloxy-5-bromophenyl)-3-phenylpropyl ester as a light yellow oil after concentration under reduced pressure (140.3 g, 93.6% yield), tlc: (1) 0.66. NMR (CDCl3) 21.67, 33.67, 39.69, 68.58, 70.28, 113.21, 113.76, 126.47, 127.84, 128.10, 128.25, 128.41, 128.51, 129.81, 130.26, 130.42, 132.91, 134.39, 136.41, 142.16, 155.07.

1. customat room temperature the solvent was removed in vacuum
2. extractionthe residue was extracted with diethyl ether
3. washThe extract was washed with hydrochloric acid, water
4. dry with materialdried over anhydrous sodium sulphate