To a solution of 1-[6-benzyloxy-2-hydroxy-3-(5-methyl-7-nitroindan-4-yloxy)phenyl]ethanone (1.081 g) in dichloromethane (18 mL) were added triethylsilane (0.955 mL) and trifluoroacetic acid (6 mL). The mixture was stirred at room temperature overnight. Adding water, the reaction mixture was stirred for 30 min and extracted with dichloromethane. The organic layer was washed with a saturated aqueous solution of sodium hydrogen carbonate and brine successively, and dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure. The residue was crystallized from dichloromethane and hexane to give the title compound (663 mg).
