methyl 4-(3-bromo-4-fluorophenyl)-2-(bromomethyl)-5-oxo-4,5,6,8-tetrahydro-1H-pyrano[3,4-b]pyridine-3-carboxylate → 9-(3-bromo-4-fluorophenyl)-5,9-dihydro-3H-furo [3,4-b]pyrano[4,3-e]pyridine-1,8(4H,7H)-dione

関与物質

反応手順

The product from Example 25B (0.30 g, 0.63 mmol) was heated neat under a nitrogen atmosphere to 130° C. for 15 minutes and cooled to ambient temperature. The residue was treated with methylene chloride and the resulting solid was collected by filtration, washed with methylene chloride and dried to provide the title compound (0.074 g) as a white solid.

情報源と証拠