Question

When heated, allyl aryl ethers and allyl vinyl ethers undergo a reaction called a Claisen rearrangement, a concerted reorganization of bonding electrons similar to the Diels-Alder reaction. The reaction proceeds through a six-membered, cyclic transition state.Draw the structure of the expected product when this compound undergoes a Claisen rearrangement.For the purposes of this problem, assume that double bonds in an aromatic ring are localized at the positions indicated in the figure

Answer 1

In this case, we assume that the starting compound is phenol which become in phenoxide due to reaction with sodium hydride. Sodium ohenoxide reacts with 3-bromo-1-propene to obtain the allyl aryl ether: allyl phenylether.

The allyl aryl ether undergoes Claisen reanrrangement when is heat between 200 and 250 celsius grades obtaining o-allyl phenol.