反应详情

600 mg (2.75 mmol) of the compound from Example 141A and 0.25 ml (3.30 mmol) of trifluoroacetic acid were added to 487 mg (2.75 mmol) of the compound from Example 8A in 4 ml of dichloromethane. The reaction mixture was stirred at RT for 30 min, and the crude product was then purified twice by preparative HPLC (mobile phase: acetonitrile/water gradient) and once by flash chromatography on silica gel (mobile phase: cyclohexane/ethyl acetate 10/1). 404 mg (39% of theory) of the title compound were obtained.

1. customthe crude product was then purified twice by preparative HPLC (mobile phase: acetonitrile/water gradient) and once by flash chromatography on silica gel (mobile phase: cyclohexane/ethyl acetate 10/1)