反应详情

Cinnamoyl chloride (6.0 g., 0.036 mole) is added to a solution of 2-(o-aminophenethyl)-1-methylpiperidine (7.8 g., 0.036 mole) in 100 ml. of pyridine in one portion with vigorous stirring. Stirring is continued for 3 hours and the pyridine solution is then concentrated in vacuo. The resulting residue is taken up to 150 ml. of water and made basic with 40% sodium hydroxide. The basified solution is extracted with several 200 ml. portions of ether, which are combined, washed with water, dried over magnesium sulfate and the ether solvent evaporated. The residue thus obtained crystallizes and is further purified by crystallizing from isopropyl ether providing 8.7 g. (70% yield) of analytically pure 2'-[2-(1-methyl-2-piperidyl)ethyl]cinnamanilide melting at 101.5°-103.5° C. (corr.).

1. concentrationthe pyridine solution is then concentrated in vacuo
2. extractionThe basified solution is extracted with several 200 ml
3. washwashed with water
4. dry with materialdried over magnesium sulfate
5. customthe ether solvent evaporated
6. customThe residue thus obtained
7. customcrystallizes
8. customis further purified
9. customby crystallizing from isopropyl ether providing 8.7 g