Catalytic CH Bond Addition of Pyridines to Allenes by a Rare‐Earth Catalyst

Publisher: John Wiley & Sons Inc

E-ISSN: 1521-3765|21|23|8394-8398

ISSN: 0947-6539

Source: CHEMISTRY - A EUROPEAN JOURNAL, Vol.21, Iss.23, 2015-06, pp. : 8394-8398

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Abstract

AbstractThe catalytic CH addition of pyridines to allenes has been achieved for the first time by using a half‐sandwich scandium catalyst, thus constituting a straightforward and atom‐economical route for the synthesis of alkenylated pyridine derivatives. The reaction proceeded regio‐ and stereoselectively, affording a new family of alkenylated pyridine compounds which are otherwise difficult to synthesize. A cationic Sc‐η2‐pyridyl species was isolated and confirmed to be a key catalyst species in this transformation.