反应详情

The compound prepared in Example 1 (44 mg) was dissolved in dichloromethane (2 ml), and trifluoroacetic acid (1 ml) was added at 0□. The mixture was stirred for two hours while it was slowly warmed to room temperature, and then concentrated under reduced pressure to give the title compound (Iaa) in a stoichiometric amount.

1. concentrationconcentrated under reduced pressure