反应详情

A solution of 15.5 g. of 4-dimethylaminocyclohexanone and 15.2 g. of 4-carboxyphenylhydrazine in 200 ml. of 5-N hydrogen chloride in ethyl alcohol was refluxed for twentyfour hours and the reaction mixture was evaporated to dryness under reduced pressure. The residue was dissolved in water, the aqueous solution was made alkaline with dilute sodium hydroxide and extracted with methylene dichloride and the extract was evaporated to dryness under reduced pressure to give, after recrystallization from isopropyl alcohol, 17.8 g. of 3-(dimethylamino)-6-ethoxycarbonyl-1,2,3,4-tetrahydrocarbazole, m.p. 188°-190° C.

1. customthe reaction mixture was evaporated to dryness under reduced pressure
2. dissolutionThe residue was dissolved in water
3. extractionextracted with methylene dichloride
4. customthe extract was evaporated to dryness under reduced pressure
5. customto give
6. customafter recrystallization from isopropyl alcohol, 17.8 g