N1C=CN=C1.[Si:6](Cl)([C:9]([CH3:12])([CH3:11])[CH3:10])([CH3:8])[CH3:7].[CH3:14][O:15][C:16](=[O:21])[C@@H:17]([CH3:20])[CH2:18][OH:19].O>CN(C)C=O>[CH3:14][O:15][C:16](=[O:21])[C@@H:17]([CH3:20])[CH2:18][O:19][Si:6]([C:9]([CH3:12])([CH3:11])[CH3:10])([CH3:8])[CH3:7]Imidazole (13.3 g, 196 mmol) and tert-butyldimethylsilyl chloride (14.2 g, 94.1 mmol) were added to a solution of (S)-3-hydroxy-2-methylpropionic acid methyl ester (11.0 g, 93.1 mmol) in dimethylformamide (100 mL), and the mixture was stirred at room temperature for four hours. Water was added to the reaction mixture, followed by extraction with hexane twice. The extract was then dried over magnesium sulfate. After filtration, the solvent was evaporated under reduced pressure to give 24 g (quantitative) of the title compound as a colorless oil.
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