反应详情

The solid residue obtained in step A was dissolved in 1.5 ml of trifluoroacetic acid and stirred for 45 minutes at room temperature. The solvent was evaporated and the solid residue was tritured with a diethyl ether/hexane mixture. The solid was filtered off affording 0.093 g (yield 74%) of the expected product.

1. customThe solvent was evaporated
2. filtrationThe solid was filtered off