[BH4-].[Na+].[Cl:3][C:4]1[CH:9]=[CH:8][C:7]([C:10]([CH:12]2[CH2:14][C:13]2([F:16])[F:15])=[O:11])=[CH:6][CH:5]=1.[Cl-].[NH4+].C(OCC)C>C(O)C.C(OCC)(=O)C>[Cl:3][C:4]1[CH:5]=[CH:6][C:7]([CH:10]([CH:12]2[CH2:14][C:13]2([F:15])[F:16])[OH:11])=[CH:8][CH:9]=1336 mg (8.89 mmol) of sodium borohydride were added to 1.75 g (8.08 mmol) of the compound from Example 124A in 33 ml of ethanol and 9 ml of ethyl acetate under argon, and the mixture was stirred at 40° C. for 1 h. The reaction mixture was added to saturated aqueous ammonium chloride solution and diethyl ether, the phases were separated, the aqueous phase was extracted twice with diethyl ether, and the combined organic phases were washed with saturated aqueous sodium chloride solution, dried over magnesium sulfate, filtered and concentrated. 1.44 g (82% of theory) of a mixture of the diastereomers of the title compound were obtained.
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