[Na].Br[CH:3]([CH2:13][C:14]([Cl:17])([Cl:16])[Cl:15])[C:4]([CH3:12])([CH3:11])[CH2:5][C:6]([O:8][CH2:9][CH3:10])=[O:7]>C(O)(C)(C)C.C1C=CC=CC=1>[Cl:15][C:14]([Cl:17])([Cl:16])[CH2:13][CH:3]1[C:4]([CH3:12])([CH3:11])[CH:5]1[C:6]([O:8][CH2:9][CH3:10])=[O:7]To a solution of 46 mg of sodium in a mixture of 12ml of t-butanol and 6 ml of benzene was added, at room temperature, 709 mg of ethyl 4-bromo-6,6,6-trichloro-3,3-dimethylhexanoate. The mixture was treated as described in Example XII A to produce 470 mg (86% yield) of ethyl 2-(β,β,β-trichloroethyl)-3,3-dimethylcyclopropanecarboxylate.
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