Acetic Acid → N-(3-Methylphenyl)urea

Participants

Reaction Steps

To a solution of N-[(3RS)-5-cycloheptyl-2,3-dihydro-2-oxo-1H-1,4-benzodiazepin-3-yl]-N'-(3-methylphenyl)urea (0.102 g) and N-bromomethylcarbonyl-3-azabicyclo[3.2.2]nonane (0.079 g) in dry N,N-dimethylformamide (10 ml) was added sodium hydride (0.011 g of a 63.8% dispersion in mineral oil) at 5°-10° C. The mixture was stirred at the same temperature for 30 minutes and then at ambient temperature overnight. The resultant mixture was treated with 0.1 g of acetic acid at room temperature for 30 minutes and then concentrated in vacuo. The residue was disolved with ethyl acetate (100 ml) and washed with saturated sodium hydrogen carbonate aqueous solution (20 ml) and a brine (20 ml). The organic layer was dried over magnesium sulfate. Filtration and evaporation gave a crude product. The crude product was purified by column chromatography on silica gel with chloroform and a mixture of chloroform and ethyl acetate (5:1) as eluents to afford N-[(3RS)-1-[(3-azabicyclol3.2.2]non-3-yl)carbonylmethyl]-5-cycloheptyl-2,3-dihydro-2-oxo-1H-1,4-benzodiazepin-3-yl]-N'-(3-methylphenyl)urea (0.090 g).

Provenance & Evidence