Figure 1.

The tetracyclo[5.3.1.01,704,11]undec‐2‐ene skeleton (I) as precursor for tricyclo[5.3.1.04,11]undec‐2‐enes (II) through cleavage of bond a and for tricyclo[6.2.1.01,5]undecanes (III) through cleavage of bond b.

The tetracyclo[5.3.1.01,704,11]undec‐2‐ene skeleton (I) as precursor for tricyclo[5.3.1.04,11]undec‐2‐enes (II) through cleavage of bond a and for tricyclo[6.2.1.01,5]undecanes (III) through cleavage of bond b.