Question

What product is formed by ring-closing metathesis of each compound?

a.

b.

Short answer

a.

b.

Step-by-step solution

Metathesis reaction

There are several classes of metathesis reactions, and some of them are ring-opening metathesis reactions and ring-closing metathesis reactions. The pharmaceutical industry utilizes metathesis reactions for synthesizing drugs.

Ring-closing metathesis reaction

Ring-closing metathesis reactions occur with the help of a Grubbs catalyst. Several alkenes are acquired as products in metathesis reactions.

Starting material needed to synthesize the given compounds

a. The given diene reacts with a Grubbs catalyst to form the ring-closing metathesis product. The reaction can be given as follows.

Product formed by the ring-closing metathesis of compound a

b. The reaction of the given compound with a Grubbs catalyst gives rise to the ring-closing metathesis product. The reaction can be given as follows.

Product formed by the ring-closing metathesis of compound b