Electronic control of stereoselectivity. 3. Stereoselection operative in [4 + 2].pi. cycloadditions to cyclopentadiene rings fused at C2,C3 to bicyclic frameworks
Electronic control of stereoselectivity. 3. Stereoselection operative in [4 + 2].pi. cycloadditions to cyclopentadiene rings fused at C2,C3 to bicyclic frameworks