Lithium hydroxide, monohydrate → 3-[3-[1-(5-methylfuran-2-yl)carbonylmethyl-2-oxo-5-pivaloyl-8-methyl-1,3,4,5-tetrahydro-2H-1,5-benzodiazepin-3-yl]ureido]benzoic acid

Participants

Reaction Steps

1-[1-(5-Methylfuran-2-yl)carbonylmethyl-2-oxo-5-pivaloyl-8-methyl-1,3,4,5-tetrahydro-2H-1,5-benzodiazepin-3-yl]-3-(3-ethoxycarbonylphenyl)urea (0.80 g) was dissolved in the mixed solvent of tetrahydrofuran (10 ml) and methanol (10 ml), aqueous lithium hydroxide monohydrate (0.29 g) solution (10 ml) was added, the mixture was stirred at room temperature for 14 hours. The reaction mixture was concentrated under reduced pressure, the residue was weakly acidified with 1N hydrochloric acid and extracted with chloroform. The organic layer was washed with water and saturated brine, dried over anhydrous magnesium sulfate, the solvent was evaporated under reduced pressure, and the residue was purified by silica gel column chromatography(chloroform:methanol=20:1), to thereby obtain 442 mg of the title compound as a light yellow crystal.

Provenance & Evidence