反应详情

A solution of compound 7 (6 g, 16.1 mmol) in methylene chloride (20 mL) and trifluoroacetic acid (20 mL) was stirred at r.t for 1 h. Then the mixture was concentrated in vacuo to give the compound 8 (4.3 g, 98%)

1. concentrationThen the mixture was concentrated in vacuo