Rhodium-Catalyzed Asymmetric Conjugate Addition of Arylboronic Acids to Nitroalkenes Using Olefin–Sulfoxide Ligands
作者:Feng Xue、Dongping Wang、Xincheng Li、Boshun Wan
DOI:10.1021/jo3003562
日期:2012.4.6
An efficient rhodium/olefin–sulfoxide catalyzed asymmetric conjugateaddition of organoboronic acids to a variety of nitroalkenes has been developed, where 2-methoxy-1-naphthyl sulfinyl functionalized olefin ligands have shown to be highly effective and are applicable to a broad scope of aryl, alkyl, and heteroaryl nitroalkenes.
Deoxycholic Acid-Derived Biaryl Phosphites as Versatile and Enantioselective Ligands in the Rhodium-Catalyzed Conjugate Addition of Arylboronic Acids to Nitroalkenes
作者:Varsha R. Jumde、Anna Iuliano
DOI:10.1002/adsc.201300619
日期:2013.11.25
AbstractA highly enantioselective conjugate addition of arylboronic acids to cyclic as well as acyclic aromatic and aliphatic nitroalkenes is presented. The rhodium complexes obtained from deoxycholic acid‐derived binaphthyl and flexible biphenyl phosphites showed good activity as well as very high enantioselectivity (ee up to 99%) in the conjugated addition even in the presence of challenging substrates such as 1‐nitrocyclohexene or aliphatic acyclic nitroalkenes.magnified image