Acylation of Electrophilic Olefins through Decatungstate‐Photocatalyzed Activation of Aldehydes

With tungsten and lamp: Ketones were prepared by the photocatalytic generation of acyl radicals from aldehydes and trapping them with equimolar amounts of electrophilic alkenes. Photocatalysis with tetrabutylammonium decatungstate is effective also at low temperatures (−20 to −50 °C), thus minimizing radical decarbonylation and allowing acylation by highly substituted aldehydes. EWG=electron-withdrawing group. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2007/z604820_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.