反应详情

A 3.3 g. portion of 9-aminocarbonyl-9-(2-cyanoethyl)fluorene from Example 27 was hydrogenated in 95 ml. of glacial acetic acid under 4 atmospheres of hydrogen pressure for two hours at 24° C. in the presence of 1.5 g. of platinum oxide catalyst. The reaction mixture was filtered to remove the catalyst and the solvent was removed by evaporation under reduced pressure. The product which remained was dissolved in ethyl acetate and then extracted into 1 N hydrochloric acid. The aqueous acid layer was separated, made alkaline with 50% sodium hydroxide, and extracted several times with fresh ethyl acetate. The extracts were combined, washed with water and with brine, dried, and the solvent was removed by evaporation under reduced pressure to provide 2.3 g. of a white solid. The solid was dissolved in 1 N hydrochloric acid, filtered, and diluted with water to 100 ml. The aqueous acid solution was lyophilized to provide a white solid, which was crystallized from methanol and ethyl acetate was identified as 1.0 g. of 9-(3-aminopropyl)-9-aminocarbonylfluorene. m.p. 198°-200° C.

1. filtrationThe reaction mixture was filtered
2. customto remove the catalyst
3. customthe solvent was removed by evaporation under reduced pressure
4. dissolutionThe product which remained was dissolved in ethyl acetate
5. extractionextracted into 1 N hydrochloric acid
6. customThe aqueous acid layer was separated
7. extractionextracted several times with fresh ethyl acetate
8. washwashed with water and with brine
9. customdried
10. customthe solvent was removed by evaporation under reduced pressure
11. customto provide 2.3 g
12. filtrationfiltered
13. additiondiluted with water to 100 ml
14. customto provide a white solid, which
15. customwas crystallized from methanol and ethyl acetate