The stereochemistry control of radical reactions has been a field of intense investigations in the last 20 years. Rules have been proposed to rationalize the results, interestingly these rules parallels the ones formerly developed for ionic and concerted reactions. The use of captodative radicals combined with phenylseleno group transfer reaction is a powerful tool which allows a wide range of chain reaction in intra and inter molecular manner. In this book we will present several aspects of these type of radical generated form selenylated alpha hydroxy acids derivatives. These reaction have...