Question

3. Find the product(s) of the following reaction: O +

Answer 1

The above given reaction is an example of diels-alder reaction, and this is the also the example of [4+2] cycloaddition reaction, in which there must be a diene and dienophile undergoes [4+2] cycloaddition, the suitable condition for the diels - alder reaction is thermal conditions. Here the enophile is the alpha-beta unsaturated ketone, the major product is the endo product, and the minor is exo, the products of the above given reactions and its mechanism are given in the following picture,

A + [4+2] (major Cendo) and cycloaddition enophile ere i minor) 11 ceco). "products with eart stereochemnity? 0 H 4 - major minor Mechanism i 11 11 2"