Electron transfer driven reactions of transition metal π-complexes: Hydrogenation of styrene-Cr(CO)3 derivatives by samarium(II)iodide in the presence of water

✍ Scribed by Hans-Günther Schmalz; Stephan Siegel; Dirk Bernicke

• Publisher: Elsevier Science
• Year: 1998
• Tongue: French
• Weight: 221 KB
• Volume: 39
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(98)01436-1

✦ Synopsis

The hydrogenation of the double bond of styrene-Cr(CO) 3 and some dihydronaphthalene-Cr(CO~ 3 derivatives is achieved using samarium(lI)iodide in the presence of water. 1,2-D1hydronaphthalcne complexes carrying olefinic side chains in 4-position are reduced with virtually complete reglo-and diastereocontrol leading t~ 1-endo-substituted tetralin complexes. The reactions seem to proceed via Cr(CO) 3 complexed benzyhc radical, which are trapped by electron transfer to give the corresponding Cr-stabilized benzylic anions.