Vinylepoxides as Versatile Substrates for Allylations of Amino Acids and Peptides
作者:Uli Kazmaier、Sarah Thies
DOI:10.1055/s-0029-1218536
日期:2010.1
Vinyl epoxides are excellent substrates for Pd-catalyzed allylic alkylations of chelated enolates. Nucleophilic attack on the predominantly formed syn/syn Ï-allyl complexes occurs regioselectively at the distal position. The E-configured product is formed preferentially, depending on the substitution pattern and the reaction conditions used.
Straightforward Approach to Ferrocenyl Amino Acids and Peptides by Allylic Alkylation
作者:Jan Gorges、Angelika Ullrich、Uli Kazmaier
DOI:10.1002/ejoc.201300346
日期:2013.7
Ferrocenylallyl carbonates have been found to be suitable substrates for palladium-catalyzed allylic alkylation reactions. Amino acidester and peptide enolates were employed as nucleophiles for the regio- and stereoselective introduction of the redox-active ferrocenyl unit into peptide chains.
Selective Peptide Modifications via Ruthenium-Catalyzed Allylic Alkylations
作者:Anton Bayer、Uli Kazmaier
DOI:10.1021/jo501731y
日期:2014.9.5
Ruthenium-catalyzed allylicalkylations are an interesting alternative to palladium-catalyzed processes, since they can provide products which are not accessible under Pd-catalysis. Chiral terminal allylic substrates can be reacted with perfect stereo- and regioretention, and also (Z)-configured allylic substrates can be converted isomerization-free. This allows highlystereoselective modifications of peptides at glycine