Acetic Anhydride → HCID 86741817, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 2.9 parts of N-[2-[4-[[1-(2-furanylmethyl)-1H-benzimidazol-2-yl]methyl]-1-piperidinyl]-ethyl]-2-(methylamino)benzamide, 10 parts of acetic acid anhydride and 20 parts of water was stirred and heated for 3 hours at 100° C. The reaction mixture was cooled, water was added and the whole was made alkaline with ammonium hydroxide. The product was extracted with dichloromethane. The extract was dried, filtered and evaporated. The residue was purified twice by column chromatography over silica gel using each time a mixture of trichloromethane and methanol, saturated with ammonia (95:5 by volume) as eluent. The pure fractions were collected and the eluent was evaporated. The residue was converted into the ethanedioate salt in ethanol, yielding 0.2 parts (4.3%) of 2-(acetylmethylamino)-N-[2-[4-[[1-(2-furanylmethyl)-1H-benzimidazol-2-yl]-methyl]-1-piperidinyl]ethyl]benzamide ethanedioate (2:5); mp. 146.8° C. (511).

Provenance & Evidence