反应详情

Intermediate 38a (141 mg) obtained in Step A was dissolved in a solution of trifluoroacetic acid (0.9 ml, Aldrich) in dichloromethane (2.1 ml), and the solution was stirred at room temperature 5 hours. The solvent was evaporated under reduced pressure to obtain the title compound as trifluoroacetate (145 mg).

1. customThe solvent was evaporated under reduced pressure