反应详情

14 g (47 mmol) 4-dibenzylamino-cyclohexanone, 8.5 g (51 mmol) 1-methanesulphonyl-piperazine and 17.5 g (78 mmol) sodium triacetoxyborohydride are stirred in 250 ml dichloromethane for 4 hours at ambient temperature. Then the reaction mixture is combined with 200 ml of water and 20 g potassium carbonate. The organic phase is separated off, dried and evaporated to dryness. The residue is purified by chromatography. Yield: 4.8 g trans-isomer 4.8 g (11 mmol) trans-dibenzyl-[4-(4-methanesulphonyl-piperazin-1-yl)-cyclohexyl]-amine are dissolved in 100 ml of methanol and 2 g palladium/charcoal (10%) are added. The mixture is hydrogenated at 50 psi and 50° C. Then the catalyst is suction filtered, the mother liquor is concentrated by evaporation. The precipitate formed is suction filtered and washed with diethyl ether. Yield: 2.4 g

1. customThe organic phase is separated off
2. customdried
3. customevaporated to dryness
4. customThe residue is purified by chromatography
5. customis hydrogenated at 50 psi and 50° C
6. filtrationfiltered
7. concentrationthe mother liquor is concentrated by evaporation
8. customThe precipitate formed
9. filtrationfiltered
10. washwashed with diethyl ether