[H-].[Al+3].[Li+].[H-].[H-].[H-].C[O:8][C:9](=O)[C:10]1[CH:15]=[C:14]([O:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)[CH:13]=[N:12][CH:11]=1.O.[OH-].[Na+]>O1CCCC1>[O:16]([C:14]1[CH:15]=[C:10]([CH2:9][OH:8])[CH:11]=[N:12][CH:13]=1)[C:17]1[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=1
To a suspension of lithium aluminum hydride (689 mg, 14.5 mmol, purity: 80%) in tetrahydrofuran (20 mL) was added 5-phenoxy-nicotinic acid methyl ester (1.11 g, 4.84 mmol) described in Manufacturing Example 145-1-1 at 0° C., which was stirred for 20 minutes at room temperature. First water (689 μL), then a 5 N sodium hydroxide aqueous solution (689 μL), and then water (2.07 mL) were added at 0° C. to the reaction mixture, which was filtered through a Celite pad. The filtrate was concentrated under a reduced pressure, and the residue was purified by NH silica gel column chromatography (heptane:ethyl acetate=1:1) to obtain the title compound (756 mg, 78%).
Wird geladen…
