Efficient, Regioselective Palladium-Catalyzed Tandem Heck-Isomerization Reaction of Aryl Bromides and Non-Allylic Benzyl Alcohols
作者:Matthew L. Crawley、Kristin M. Phipps、Igor Goljer、John F. Mehlmann、Joseph T. Lundquist、John W. Ullrich、Cuijian Yang、Paige E. Mahaney
DOI:10.1021/ol900036y
日期:2009.3.5
An efficient and mild method to couple arylbromides and activated non-allylic alcohols in a Heckreaction with tandem isomerization to selectively afford high yields of 1,5-diarylalkan-1-ones has been developed. Mechanistic insight was gained through NMR studies of products derived from deuterium-labeled intermediates.
An efficient cross-coupling between acylzirconocenes, readily prepared by hydrozirconation/carbonylation of alkenes, and diaryliodonium tetrafluoroborates is reported. This procedure enables the synthesis of a variety of alkyl-aryl-ketones upon simple catalysis with copper cyanide without the need of additional ligands and only requires a low pressure of carbon monoxide generated in situ, in a two-chamber