Pyridinium chloride → rac-cis-1-[6-(6-hydroxy-2,3,3a,4,5,9b-hexahydro-1H-benzo[e]indol-3-yl)hexyl]-4,4-dimethylpiperidine-2,6-dione

Participants

Reaction Steps

In an analogous manner to that described in Example 20b), from 9.2 g (21.56 mmol) of rac-cis-1-[6-(6-methoxy-2,3,3a,4,5,9b-hexahydro-1H-benzo[e]indol-3-yl)-hexyl]-4,4-dimethyl-piperidine-2,6-dione using pyridine hydrochloride there were obtained 7.9 g of (89%) rac-cis-1-[6-(6-hydroxy-2,3,3a,4,5,9b-hexahydro-1H-benzo[e]indol-3-yl)hexyl]-4,4-dimethylpiperidine-2,6-dione; yellowish crystals of m.p. 98.5°-99° after crystallization from ether/hexane.

Provenance & Evidence