[H-].[H-].[H-].[H-].[Li+].[Al+3].[Br:7][C:8]1[CH:9]=[C:10]([CH:14]=[CH:15][C:16]=1[C:17]([F:20])([F:19])[F:18])[C:11]([NH2:13])=O.C(OCC)(=O)C.[OH-].[Na+]>C1COCC1.C(OCC)C>[Br:7][C:8]1[CH:9]=[C:10]([CH:14]=[CH:15][C:16]=1[C:17]([F:18])([F:19])[F:20])[CH2:11][NH2:13]
LiAlH4 (0.906 g, 23.9 mmol) was suspended in 60 mL of dry THF and cooled to 0° C. The mixture was treated with the product from Example 243B (3.2 g, 11.9 mmol) in THF (10 mL) dropwise with stirring. After 20 minutes, the mixture was warmed to room temperature 12 hours and treated in succession with ethyl acetate (2 mL), NaOH (50%, 5 mL), and diethyl ether (100 mL). The organic phase decanted, dried (Na2SO4), filtered and the filtrate was concentrated under reduced pressure to provide the title compound.
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