Hydrochloric Acid → Benzamide

Participants

Reaction Steps

To a solution of 1.0 g of trans-(±)-4-bromo-N-methyl-N-[3-oxo-2-(1-pyrrolidinyl)cyclohexyl]benzamide, prepared as described in Example 1C above, in fifty ml of dry methanol there is added 5 ml of trimethylorthoformate and 0.5 ml of 4M methanolic hydrogen chloride. The resulting mixture is refluxed for about 16 hours, cooled, and the solvent is removed in vacuo. The residual oil is crystallized from a hot methanol solution thereof diluted with diethyl ether until the mixture becomes cloudy to obtain the titled 4-bromo-N-methyl-N-[3,3-dimethoxy)-2-(1-pyrrolidinyl)cyclohexyl]benzamide, which is converted to a hydrochloride salt.

Provenance & Evidence