Ammonia → HCID 67914513, compound

Participants

Reaction Steps

A mixture of 2.88 parts of cis-4-amino-5-chloro-N-[1-[4-(4-fluorophenyl)-3-hydroxy-4,4-dimethoxybutyl]-3-methoxy-4-piperidinyl]-2-methoxybenzamide, 30 parts of concentrate hydrochloric acid and 25 parts of water was stirred for 18 hours at room temperature. 100 Parts of water were added and the whole was alkalized with ammonia. The precipitated product was filtered off and taken up in trichloromethane. The organic phase was separated, dried, filtered and evaporated. The residue was purified by column-chromatography over silica gel using a mixture of trichloromethane and methanol (95:5 by volume) saturated with ammonia, as eluent. The pure fractions were collected and the eluent was evaporated. The residue was taken up in benzene. Upon the addition of petroleumether, the product was precipitated. It was filtered off the dried, yielding 0.47 parts (16%) of cis-4-amino-5-chloro-N-[1-[4-(4-fluorophenyl)-3-hydroxy-4-oxobutyl]-3-methoxy-4-piperidinyl]-2-methoxybenzamide; mp. 146.4° C. (compound 238).

Provenance & Evidence