Catalytic hydrogenation of α,β-unsaturated carboxylic acid derivatives using copper(<scp>i</scp>)/N-heterocyclic carbene complexes
作者:Birte M. Zimmermann、Sarah C. K. Kobosil、Johannes F. Teichert
DOI:10.1039/c8cc09853k
日期:——
air-stable copper(I)/N-heterocyclic carbene complex enables the catalytic hydrogenation of enoates and enamides, hitherto unreactive substrates employing homogeneous copper catalysis and H2 as a terminal reducing agent. This atom economic transformation replaces commonly employed hydrosilanes and can also be carried out in an asymmetric fashion.
Mono- and β,β-Double-Heck Reactions of α,β-Unsaturated Carbonyl Compounds in Aqueous Media
作者:Luis Botella、Carmen Nájera
DOI:10.1021/jo0502551
日期:2005.5.1
and nitrile. β,β-Diarylation of unsubstituted α,β-unsaturated carbonyl compounds can be controlled by using higher loading of the palladacycle and can be performed in refluxing water for aryl iodides, whereas DMA must be used for aryl bromides. Microwave irradiation can be used in the monoarylation of tert-butyl acrylate with aryl iodides in water or the coupling between ethyl cinnamate and aryl bromides
Development of a palladium catalyzed addition of boronic acids to alkynyl esters: synthesis of trisubstituted olefins as single isomers
作者:Alexander Graham Bush、Jojo Liu Jiang、Philippa R. Payne、William W. Ogilvie
DOI:10.1016/j.tet.2009.08.029
日期:2009.10
Very small phosphine ligands allow access to single isomer trisubstituted olefins from alkynyl esters with complete control of both stereochemistry and regiochemistry. This method provides a convenient synthesis of single isomer trisubstituted olefins without requiring olefin templates.