反应详情

A solution of tert-butyl 4-((E)-3-{(Z)-2-[(1H-indazol-3-yl)methylene]-6-methoxy-3-oxo-2,3-dihydrobenzofuran-7-yl}allyl)piperidine-1-carboxylate (0.0308 g, 0.0597 mmol) in methylene chloride (2 mL) was added with a 4 M solution of hydrogen chloride in 1,4-dioxane (2 mL), and the mixture was stirred at room temperature for 2 hours. The reaction mixture was concentrated, the resulting residue was added with saturated aqueous sodium hydrogencarbonate, and the precipitated solid was collected by filtration. The solid was washed with water, and then dried under reduced pressure to obtain (Z)-2-[(1H-indazol-3-yl)methylene]-6-methoxy-7-[(E)-3-(piperidin-4-yl)prop-1-enyl]benzofuran-3(2H)-one (0.0173 g, 70%).

1. concentrationThe reaction mixture was concentrated
2. additionthe resulting residue was added with saturated aqueous sodium hydrogencarbonate
3. filtrationthe precipitated solid was collected by filtration
4. washThe solid was washed with water
5. customdried under reduced pressure