Reaction of 2,6-xylyl isoselenocyanate (1) with organolithiumcompounds was examined focussing on the siteselectivities. Phenyllithium attacked selenium exclusively whereas some benzylic organolithiums reacted at the central carbon of 1 to afford the corresponding lithium selenocarboximidates. Phenylethynyllithium and tBuLi gave mixtures of the carbophilic and selenophilic products. The lithium enolate
Zinc-Mediated Synthesis of Tertiary Alkyl Selenides from Tertiary Alkyl Halides
作者:Alain Krief、Michel Derock、Damien Lacroix
DOI:10.1055/s-2005-918933
日期:——
Diorganyl selenides are efficiently synthesized from tertiaryalkyl halides, selenols or selenolates and zinc dibromide as well as from diselenides in the presence of zinc.