BENZENESELENENYL REAGENTS IN ORGANIC-SYNTHESIS

An account of the most commonly used reagents for the introduction of the benzeneselenenyl (phenyl seleno) group is given. The review focuse s on the various methods of its introduction as auxiliary, modifying o r protective entity, and its subsequent removal, thereby often promoti ng other reactions as cyclizations or double bond formation. Less emph asis is laid on reactions of the phenylselenenylated intermediates wit h the PhSe-group left intact utilizing its stabilizing properties on c harged intermediates, on reagents with a modified phenyl group, e.g. c hiral derivatives, or on reactions not involving intermediate C-Se-bon d formation.