反应详情

5-Bromo-1,6-dihydro-6-oxo-3-pyridinecarboxylic acid methyl ester (15 g, 65 mmol, CA 381247-99-0) was suspended in THF (500 mL). To this suspension was added with stirring 2-methoxyethanol (7.1 mL, 97 mmol), diisopropylazodicarboxylate (21.5 mL, 97 mmol) and triphenylphosphine (25.4 g, 97 mmol). This mixture was stirred for 1 h at room temperature and the solvent was removed in vacuo. The residue was purified by flash chromatography on silica (heptane/ethylacetate, 2:1) to give the title compound (8.65 g) as a yellow solid; MS (ISP) 290.1 (M+H)+.

1. customthe solvent was removed in vacuo
2. customThe residue was purified by flash chromatography on silica (heptane/ethylacetate, 2:1)