Cobalt-Catalyzed Reductive Cross-Coupling Between Styryl and Benzyl Halides

Cai, Yingxiao; Benischke, Andreas D.; Knochel, Paul und Gosmini, Corinne (2017): Cobalt-Catalyzed Reductive Cross-Coupling Between Styryl and Benzyl Halides. In: Chemistry-A European Journal, Bd. 23, Nr. 2: S. 250-253

Abstract

A simple and efficient protocol for the direct reductive cross-coupling between alkenyl and benzyl halides using a Co/Mn system has been developed. This reaction proceeds smoothly in the presence of [CoBr2(PPh3)(2)] as the catalyst, with NaI as an additive in acetonitrile with a broad scope of functionalized alkenyl and benzyl halides. Different functional groups are tolerated on both coupling partners, thus, significantly extending the general scope of transition-metal-catalyzed benzylation of alkenyl halides. Moderate to excellent yields were also obtained. From a mechanistic point of view, a radical chain mechanism was proposed. This reaction is stereospecific and some studies suggest the retention of the double-bond configuration.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Chemie und Pharmazie > Department Chemie
• Themengebiete: 500 Naturwissenschaften und Mathematik > 540 Chemie
• ISSN: 0947-6539
• Sprache: Englisch