Hydrochloric Acid → HCID 21241598, compound

Participants

Reaction Steps

A mixture of 20.6 parts of 1-[(2,3-dihydro-1,4-benzodioxin-2-yl)methyl]-4-(2-methyl-1,3-dioxolan-2-yl)piperidine and 200 parts of a hydrochloric acid solution 2N was stirred and refluxed for 15 hours. After cooling, crushed ice was added. The whole was treated with a sodium hydroxide solution. The product was extracted with dichloromethane. The extract was dried, filtered and evaporated. The residue was purified by column chromatography over silica gel using a mixture of trichloromethane and methanol (99:1 by volume) as eluent. The pure fractions were collected and the eluent was evaporated, yielding 10 parts (55.8%) of 1-[1-[(2,3-dihydro-1,4-benzodioxin-2-yl)methyl]-4-piperidinyl]ethanone as an oily residue (intermediate 87).

Provenance & Evidence