反应详情

The Grignard reagent prepared by adding 210 g of p-fluorobromobenzene in 800 ml. of anhydrous ether to 29.1 g of magnesium turnings in 50 ml. of ether was added, with cooling to keep the temperature of the reaction less than 15° C., to a solution of 158.4 g of 2-chlorocyclohexanone in 800 ml. of anhydrous benzene. The reaction was stirred at 25° for 18 hrs. then the ether was distilled off and the resulting benzene solution refluxed for 24 hrs. It was then poured into a mixture of 1 liter water and 200 ml. hydrochloric acid and extracted with ether. After evaporation of the ether the residue was distilled to yield 117 g (51%), b.p. 115 (0.2 mm). The material solidified on standing and was recrystallized from hexane, m.p. 56°-59° C.

1. temperaturewith cooling
2. customthe temperature of the reaction less than 15° C.
3. distillationthen the ether was distilled off
4. temperaturethe resulting benzene solution refluxed for 24 hrs
5. additionIt was then poured into a mixture of 1 liter water and 200 ml
6. extractionhydrochloric acid and extracted with ether
7. customAfter evaporation of the ether the residue
8. distillationwas distilled
9. customto yield 117 g (51%)
10. customwas recrystallized from hexane, m.p. 56°-59° C.