[F:1][C:2]1[CH:9]=[CH:8][C:5]([CH:6]=O)=[CH:4][CH:3]=1.[NH2:10][CH:11]([C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1)[C:12]([OH:14])=[O:13].[OH-].[Na+].[BH4-].[Na+].[ClH:25]>CO.O1CCOCC1>[ClH:25].[F:1][C:2]1[CH:9]=[CH:8][C:5]([CH2:6][NH:10][CH:11]([C:15]2[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=2)[C:12]([OH:14])=[O:13])=[CH:4][CH:3]=1
4-Fluorobenzaldehyde (0.25 mL, 2.38 mmol), 2-amino-2-phenylacetic acid (300 mg, 1.98 mmol) and NaOH (79 mg, 1.98 mmol) are dissolved in MeOH (20 mL) and stirred at RT overnight. The reaction is cooled at 0° C. and NaBH4 (150 mg, 3.97 mmol) is added. After being stirred at 0° C. for 30 minutes, the reaction is judged complete by UPLC-MS analysis. 4M HCl in dioxane is added dropwise till pH 5 and the precipitate is collected by suction filtration, washed with Et2O and dried under vacuum at 40° C. to obtain intermediate I129 as a white solid (587 mg, quantitative yield).
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