what was an excess of 3 sulfolene used in diels alder reacti

what was an excess of 3 sulfolene used in diels alder reaction

Solution

3- sulfone is not a rate limiting reagent, which acts as a dienophile in the diels alder reaction thats why 3-sulfone used excees and diels alder reaction occur at thermal condition so 3-sulfone may be decompose to SO2.