反应详情

A solution of 7 g. of dimethylaminocyclohexanone and 8.4 g. of 3-methoxyphenylhydrazine hydrochloride in 40 ml. of absolute ethyl alcohol and 12 ml. of 4-N hydrogen chloride in ethyl alcohol was heated under reflux for two hours. The reaction mixture was allowed to stand for sixteen hours, filtered, and the filtrate was evaporated to dryness under reduced pressure. The residue was taken up in water, made alkaline with dilute sodium hydroxide and extracted with ether. The ether extract was washed with water, dried, ethereal hydrogen chloride was added, and the resulting oily precipitate was collected by decantation, recrystallized twice from isopropyl alcohol, suspended in chloroform and treated with dilute sodium hydroxide. The chloroform extract was evaporated to dryness under reduced pressure to give 3-(dimethylamino)-7-methoxy-1,2,3,4-tetrahydrocarbazole, m.p. 100°-105° C.

1. temperatureunder reflux for two hours
2. waitto stand for sixteen hours
3. filtrationfiltered
4. customthe filtrate was evaporated to dryness under reduced pressure
5. extractionextracted with ether
6. extractionThe ether extract
7. washwas washed with water
8. customdried
9. additionethereal hydrogen chloride was added
10. customthe resulting oily precipitate was collected by decantation
11. customrecrystallized twice from isopropyl alcohol
12. additiontreated with dilute sodium hydroxide
13. extractionThe chloroform extract
14. customwas evaporated to dryness under reduced pressure