反应详情

A solution of 59.2 g (0.47 mol) of dimethyl sulphate and 32 g (0.517 mol) of dimethyl sulphide in 270 ml of acetonitrile is stirred at room temperature for 5 days. A solution of 81.5 g (0.2655 mol) of 4-chlorophenyl 4-chlorophenyl-tert.-butyl ketone in 80 ml of acetonitrile is then added dropwise at 20° to 25° C. in the course of about 2 hours. 28.7 g (0.53 mol) of sodium methylate are added at the same temperature. The entire reaction mixture is subsequently stirred for 12 hours and is then concentrated in vacuo. The residue is stirred overnight with a mixture of 200 ml of ethyl acetate and 150 ml of water. The organic phase is separated off, dried over sodium sulphate and concentrated in vacuo. 72.6 g (85.2% of theory) of crude 2-(4-chlorophenyl)-2-(4-chlorophenyl-tert.-butyl)-oxirane are obtained and are further reacted directly. ##STR156##

1. customThe entire reaction mixture
2. concentrationis then concentrated in vacuo
3. stirringThe residue is stirred overnight with a mixture of 200 ml of ethyl acetate and 150 ml of water
4. customThe organic phase is separated off
5. dry with materialdried over sodium sulphate
6. concentrationconcentrated in vacuo