Cycloaddition Reaction Rules and Examples

Cycloaddition reactions are an important way to build cyclic compounds. They are concerted pericyclic reactions, which means the bond changes happen in one step between two unsaturated compounds. The product is a ring with two new sigma bonds formed as pi bonds are used up.

The [4 + 2] cycloaddit...

Cycloadditions are a class of pericyclic reactions in which two unsaturated compounds combine to form a cyclic product.

They are designated by the notation [m + n], where "m" and "n" indicate the number of π electrons in the interacting components.

For example, the reaction between a four π and a two π electron system is designate...