Methanol → HCID 18548762, 화합물

To a solution of 2-[3-(4-oxo-7-pyrrol-1-yl-4,5-dihydro-3H-benzo[b][1,4]diazepin-2-yl)-phenyl]-oxazole-4-carboxylic acid methyl ester (Example 25) (88 mg, 0.2 mmol) in THF (1.5 mL) were added successively MeOH (0.012 mL) and lithium borohydride (6.5 mg, 0.3 mmol). The mixture was stirred at 40° C. for 1 h and then partitioned between EtOAc and 1N HCl. The organic layer was washed with brine, dried and evaporated in vacuum. The residue was chromatographed on silica gel using EtOAc/hexane (1:2) as eluents to give the title compound (24 mg) as light-yellow solid.