Question

Question: alkyne gives each compound as the only product after hydroboration–oxidation?

a.

b.

Short answer

Answer

a.

b.

Step-by-step solution

Step-by-Step Solution Step 1: Hydroboration-oxidation reaction

Hydroboration-oxidation is a reaction which involves the conversion of alkyne to aldehyde or ketone. The reagent used for this reaction is${\mathbf{R}}_{\mathbf{2}}\mathbf{BH}\mathbf{,}{\mathbf{H}}_{\mathbf{2}}{\mathbf{O}}_{\mathbf{2}\mathbf{,}}{\mathbf{OH}}^{\mathbf{-}}$.

The general scheme of the reaction is:

Hydroboration-oxidation Reaction

Determination of starting material

Using retrosynthesis, the starting material is obtained as shown below:

a.

Retrosynthetic breakdown of compound a

b.

Retrosynthetic breakdown of compound b