[C:1]([O:5][C:6](=[O:12])[CH2:7][C:8]([CH2:10][Cl:11])=[O:9])([CH3:4])([CH3:3])[CH3:2]>C(Cl)(Cl)Cl>[C:1]([O:5][C:6](=[O:12])[CH2:7][C@@H:8]([OH:9])[CH2:10][Cl:11])([CH3:4])([CH3:2])[CH3:3]The procedure of example 369 was repeated using t-butyl-4-chloroacetoacetate as the substrate to give t-butyl-4-chloro-3(R)-hydroxybutyrate, [α]D23 +18.09° (c, 5.1 CHCl3).
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