Question

Question: Identify the lettered compounds in each reaction sequence.

a.

b.

c.

Short answer

Answer

a.

b.

c.

Step-by-step solution

Step-by-Step SolutionStep 1: Functional group interconversion

Functional group interconversion is the process of converting an organic functional group to another by treating it with specific reagents.

Products formed in the given reactions

The products formed in the given reaction sequences are:

a.

Reaction a

The reaction of the given substrate (alkene) with ${\mathrm{BH}}_3,{\mathrm{H}}_2{\mathrm{O}}_2/{\mathrm{OH}}^{-}$ (hydroboration oxidation) yields the corresponding alcohol, which on oxidation with in acidic medium yields the corresponding carboxylic acid.

b.

Reaction b

The treatment of alkyne with the base ${\mathrm{NaNH}}_2$and an alkyl iodide results in the abstraction of a proton (from the alkyne) and the substitution of the alkyl group on the alkynic carbon.

The ozonolysis of the substituted alkynes yields the corresponding carboxylic acids.

c.

Reaction c

The first step in the given reaction involves the substitution of the alkyl chain on the benzene ring (Friedel–Crafts alkylation).

Alkyl chains on an aromatic ring are oxidized into carboxylic acid on treating it with potassium permanganate$\left({\mathrm{KMnO}}_4\right)$.