Tetrahydrofuran → 3-[3-[1-(2-toluoylmethyl)-2-oxo-5-cyclohexylcarbonyl-8-methyl-1,3,4,5-tetrahydro-2H-1,5-benzodiazepin-3-yl]ureido]benzoic acid

Participants

Reaction Steps

1-[1-(2-Toluoylmethyl)-2-oxo-5-cyclohexylcarbonyl-8-methyl-1,3,4,5-tetrahydro-2H-1,5-benzodiazepin-3-yl]-3-(3-ethoxycarbonylphenyl)urea (500 mg) was dissolved in methanol (24 ml), aqueous lithium hydroxide monohydrate (168 mg) solution (12 ml) and tetrahydrofuran (12 ml) were added, and the mixture was refluxed for 30 minutes. The reaction mixture was concentrated under reduced pressure, the residue was dissolved in water (50 ml), the solution was washed with diethyl ether, acidified with 1N hydrochloric acid, and extracted with methylene chloride (50ml). The organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate, the solvent was evaporated under reduced pressure, and isoproryl ether was added to the residue for trituration, collected by filtration, to thereby obtain 240 mg of the titled compound.

Provenance & Evidence