Tandem Metal- and Organocatalysis in Sequential Hydroformylation and Enantioselective Aldol Reactions
作者:Serghei Chercheja、Peter Eilbracht
DOI:10.1002/adsc.200700160
日期:2007.8.6
Metal-catalysed hydroformylation is successfully combined with organocatalysed stereoselective aldol addition into a tandem reaction sequence. This novel type of “tandem catalysis” allows access to complex molecular systems with high levels of enantioselectivity, using simple starting materials and an amino acid as the chiral catalyst.
The photomediated reaction of alkynes with cycloalkanes
作者:Roísín A. Doohan、John J. Hannan、Niall W. A. Geraghty
DOI:10.1039/b517631j
日期:——
of a photomediator such as benzophenone, alkynes with electron-withdrawing groups react with cycloalkanes to give vinyl cycloalkanes. The reaction involves the regiospecific addition of a photochemically generated cycloalkyl radical to the beta-carbon of the alkyne. The stereochemical outcome of the reaction depends on the nature of the photomediator and alkyne used.