[CH3:1][Si:2]([CH3:17])([CH3:16])[CH2:3][CH2:4][O:5][C:6](=[O:15])[CH2:7][C@@H:8]([CH3:14])[CH2:9][C:10]([O:12]C)=[O:11].O.[OH-].[Li+].[Cl-].[NH4+].C(OCC)(=O)C>C(O)(C)C.O>[CH3:17][Si:2]([CH3:1])([CH3:16])[CH2:3][CH2:4][O:5][C:6](=[O:15])[CH2:7][C@@H:8]([CH3:14])[CH2:9][C:10]([OH:12])=[O:11]To the solution of 3-(S)-Methyl-pentanedioic acid methyl ester 2-trimethylsilanyl-ethyl ester in iso-propanol and water was added lithium hydroxide monohydrate and stirred for two hours at RT. The reaction mixture was treated with saturated ammonium chloride and ethyl acetate. The product was purified by column chromatography.
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