Dicyclohexylcarbodiimide → HCID 12821274, compound

Participants

Reaction Steps

N,N'-Dicyclohexylcarbodiimide (4.12 g; 0.02 moles) and 1-benzyl-4-aminopiperidine (3.8 g; 0.02 moles) were added successively to a solution of 2-methoxy-4-acetamido-5-nitrobenzoic acid (5.1 g; 0.02 moles) in methylene chloride (125 ml). After stirring overnight at room temperature, the insoluble N,N'-dicyclohexylurea was filtered off, the solution was washed with water, dried (Na2SO4) and the solvent removed in vacuo to give a solid. It was suspended in hot methanol and treated with the stoichiometric amount of fumaric acid to give a solution from which the N-(1-benzylpiperid-4-yl)-2-methoxy-4-acetamido-5-nitrobenzamide fumarate (6.2 g) crystallized. After recrystallization from methanol this compound melted at 204°-206° C.

Provenance & Evidence