HCID 14801536, compound → HCID 14801568, compound

Participants

Reaction Steps

To a solution of 3 g 1,3-bis[[1-cycloheptyl-3-(p-nitrophenyl)ureido]methyl]benzene (compound of Example 28) in 50 ml N,N'-dimethylformamide, was added 300 ml of 10% Pd-carbon powder, and the mixture was subjected to catalytic hydrogenation. After a predetermined volume of hydrogen gas was absorbed, the catalyst was filtered off, the solvent was distilled off under reduced pressure from the filtrate, and the residue was purified by silica gel column chromatography, giving 1.5 g of 1,3-bis[[3-(p-aminophenyl)-1-cycloheptylureido]methyl]benzene as amorphous powder. This was treated with ethanolic hydrogen chloride, and the solid thus obtained was recrystallized from aqueous ethanol, affording 1.1 g of 1,3-bis[[1-cycloheptyl-3-(p-aminophenyl)ureido]-methyl]benzene dihydrochloride.

Provenance & Evidence