Carbocyclic ring expansions with alkyne and carbene sources mediated by nickel(0) complexes: Structure of the critical organonickel intermediates

✍ Scribed by John J Eisch; Allen A Aradi; Michael A Lucarelli; Yun Qian

• Book ID: 104208246
• Publisher: Elsevier Science
• Year: 1998
• Tongue: French
• Weight: 775 KB
• Volume: 54
• Category: Article
• ISSN: 0040-4020
• DOI: 10.1016/s0040-4020(97)10216-2

✦ Synopsis

Experimental evidence is assessed concerning the nature of organonickel intermediates involved in the cyclotrimerization and the cyclotetramerization of alkynes, as well as the cross-oligomerizadon of alkynes with carbene sources, as mediated by nickel(0) complexes. In the former processes a sequential series of nickelacycloalkapolyenes are the productive intcrmeAiates and in the latter cross-oligomefi~tions nickel(0)-carbene complexes themselves arc critical precursors to the ultimately generated carbocycles.