反应详情

To a suspension of 8-[3-(1H-benzoimidazol-2-yl)-4-chloro-phenyl]-1,4-dioxa-8-aza-spiro[4.5]decane (2.00 g, 5.42 mmol) in water (50 mL) was added H2SO4 (2.50 mL) dropwise and the resulting solution was stirred for 72 h at room temperature. The solution was neutralized with Na2CO3 and the oil obtained solidified on standing in water. The precipitate was filtered and dried to obtain 1.60 g (90%) of the title compound.

1. customthe oil obtained
2. filtrationThe precipitate was filtered
3. customdried