Palladium-Catalyzed Highly Regio- and Stereoselective Addition of Organoboronic Acids to Allenes in the Presence of AcOH
作者:Shengming Ma、Ning Jiao、Longwu Ye
DOI:10.1002/chem.200305301
日期:2003.12.15
The Pd(0)-catalyzedregio- and stereoselective addition of organoboronicacids to allenes leads to stereodefined tri- or tetrasubstituted alkenes. Furthermore, this method shows high substitutent-loading capability and tolerance of various substitutents. A hydropalladation-Suzuki coupling mechanism, which may account for the regio- and stereoselectivity, is proposed.
Construction of Chiral Quaternary Carbon Centers by Pd-Catalyzed Asymmetric Allylic Substitution with <i>P</i>,<i>N</i>-1,1‘-Ferrocene Ligands
作者:Xue-Long Hou、Na Sun
DOI:10.1021/ol048729q
日期:2004.11.1
A chiralquaternarycarboncenter on allyl substrates was constructed by Pd-catalyzedallylic alkylation reaction in good to high regio- and enantioselectivities for a wide range of substrates for the first time. [reaction: see text]
Gold(I)-Catalyzed [2 + 2]-Cycloaddition of Allenenes
作者:Michael R. Luzung、Pablo Mauleón、F. Dean Toste
DOI:10.1021/ja075412n
日期:2007.10.1
A cationic phosphinegold(I)-catalyzed intramolecular [2 + 2]-cycloaddition between an allene and an alkene to form alkylidene−cyclobutanes is described. Additionally, the reported cycloisomerization reaction provides access to enantioenriched bicyclo-[3.2.0] structures using chiral biarylphosphinegold(I) complexes as catalysts.