Cycloadditions Involving More than Six Atoms

3 Cycloadditions Involving More than Six Atoms 11.3.1 The [5 -I- 2] Cycloaddition 

One way to form a seven-membered ring would be to add a five-atom component to a two-atom component. This has been achieved using a vinyl cyclopropane 11.141 as the five atom component, and rhodium catalysis 

---