Reaction prototypes, cage compounds

In this chapter, prototypes of the photochemical reactions useful for the synthesis of cage compounds are outhned first, and then photochemical approaches towards the synthesis of [n]prismanes as representative cage compounds are reviewed. 

Prototypes of the Photochemical Reactions for the Synthesis of Cage Compounds... 

Prototypes of the photochemical reactions for the synthesis of cage compounds are classified as shown in Table 22.1. The most predominant examples are [2 + 2]-reactions of Diels-Alder adducts with an endo-configuration. Intramolecular photochemical [2 + 2]-, (6 +2 ]- and [6 -I- 6]-reactions in the rigid polycycHc framework have been increasingly employed for the synthesis of polycyclic cage compounds. Other photochemical reactions, such as [4 -t 4]-cycloaddition and related processes, are also important. According to this arrangement, prototypes of the photocycloadditions and their important applications are described. 

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