反应详情

A solution of 281 (2.71 mg, 5.35 mmol) in a mixture AcOH/water (32 mL/8 mL) was heated at 90° C. for 29 h. After cooling to RT the reaction mixture was diluted with water to form a precipitate that was collected by filtration and dried under vacuum to afford the title compound 282 (2.25 g, 5.02 mmol, 94% yield) as a brown solid. MS (m/z): 449.2 (M+H).

1. customto form a precipitate that
2. filtrationwas collected by filtration
3. customdried under vacuum