反应详情

The Grignard reagent resulting from the action of 48.9 g (0.3M) of bromobenzene on 8.75 g (0.35M) of magnesium in the form of turnings is prepared in 300 ml of anhydrous ether. To it is added 19.6 g (0.2M) of cyclohexanone dissolved in 300 ml of anhydrous ether. Stirring takes place for 3 h on the reflux condenser and the complex is decomposed by a cold, saturated NH4Cl solution and then, after settling, the liquids are extracted with ether (3×200 ml). The ethers are dried (Na2SO4) and evaporated in vacuo to give a yellowish solid which, after two crystallizations in petroleum ether, give 25 g of white 1-phenyl-cyclohexanol melting at 60° to 61° C. (IR).

1. customfor 3 h
2. extractionthe liquids are extracted with ether (3×200 ml)
3. dry with materialThe ethers are dried (Na2SO4)
4. customevaporated in vacuo
5. customto give a yellowish solid which
6. customafter two crystallizations in petroleum ether