Piperidine → HCID 178452319, 화합물

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A solution of tert-butyl 4-[(5-chloro-6-hydroxy-3-oxo-2,3-dihydrobenzofuran-7-yl)methyl]piperazine-1-carboxylate (0.100 g, 0.261 mmol) synthesized in Example B13, Step 2 in methanol (1 mL) was added with 5-fluoro-1H-indazole-3-carbaldehyde (0.0428 g, 0.261 mmol) synthesized in Example B8, Step 3, and piperidine (0.00222 g, 0.0261 mmol) at room temperature, and the mixture was stirred at 60° C. for 1 hour. The reaction mixture was cooled to room temperature, then added with methanol (4 mL), and suspended in methanol and thereby washed to obtain tert-butyl (Z)-4-({5-chloro-2-[(5-fluoro-1H-indazol-3-yl)methylene]-6-hydroxy-3-oxo-2,3-dihydrobenzofuran-7-yl}methyl)piperazine-1-carboxylate (0.050 g, 36%).

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