An intramolecular Diels–Alder reaction involving fulvenes as 4π components—stereoselective synthesis of novel oxatricyclo[6.4.0.02,10] dodeca-2,11-diene ring system

Fulvenes acting as 4π components in an intramolecular [4+2] cycloaddition reaction leading to the formation of novel 6-oxatricyclo [6.4.0.02,10] dodeca-2,11-diene ring systems have been described. Importance of steric buttressing effect in promoting the reaction has been discussed.