反应详情

A mixture of 53 g. of phenylbenzylamine and 30 g. of ethyl 6-bromocyclohexanone-2-carboxylate was maintained in a nitrogen atmosphere at 35° C. for several days. Fused powdered zinc chloride (48 g.) was added and the mixture was heated at 125°-130°C. for 11/2 hours. The cooled mixture was slurried in water and extracted with ether. The ether extract was washed with 5% hydrochloric acid and water, dried, and evaporated to dryness to give 38.5 g. crude ethyl ester of the title compound which was treated with a solution of 48 g. potassium hydroxide in 200 ml. water and 200 ml. ethyl alcohol at reflux temperature for three hours. The solution was evaporated to dryness under reduced pressure, the resulting residue was dissolved in water and the aqueous solution was extracted with ether and acidified with 10% hydrochloric acid. The resulting solids were collected and dried to give 27.4 g. of the title compound; m.p. 212°-215°C. (tetrahydrofuran-pentane).

1. additionA mixture of 53 g
2. temperaturethe mixture was heated at 125°-130°C. for 11/2 hours
3. extractionextracted with ether
4. extractionThe ether extract
5. washwas washed with 5% hydrochloric acid and water
6. customdried
7. customevaporated to dryness
8. customto give 38.5 g