Reaction (i):

Here are the reagents for the given reactions:

• Reaction (i): The reaction transforms cyclohexyl bromide into cyclohexyl-isopropyl, with lithium bromide as a byproduct. This is a Corey-House synthesis (Gilman reagent coupling), which forms a new carbon-carbon bond by coupling an alkyl halide with an organocuprate reagent. To introduce an isopropyl group, the required Gilman reagent is lithium diisopropylcuprate. The structure shown above the arrow in the image appears to be isobutyl copper, which would lead to a different product. Assuming the product shown (cyclohexyl-isopropyl) is correct, the reagent must be derived from an isopropyl group.

  Reagent: Lithium diisopropylcuprate

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