1. Introduction	505
2. Synthesis of isoselenocyanates and acylisoselenocyanates	505
3. Reactions with amines	507
4. Reactions with alcohols and thiols	513
5. Reactions with selenolates	516
6. Reactions with carbanions	518
7. Reactions with azodicaboxylates and diazomethanes	521
8. Cycloaddition reactions	523
9. Iodo- and acid-catalyzed cyclization reactions	525
10. Synthesis of pentalenes	525
11. Conclusions	528