In Situ Generated Bulky Palladium Hydride Complexes as Catalysts for the Efficient Isomerization of Olefins. Selective Transformation of Terminal Alkenes to 2-Alkenes
作者:Delphine Gauthier、Anders T. Lindhardt、Esben P. K. Olsen、Jacob Overgaard、Troels Skrydstrup
DOI:10.1021/ja9108424
日期:2010.6.16
enriched substrates provided products without epimerization at the allylic stereogenic carbon centers. Finally, some mechanisticinvestigations were undertaken to understand the nature of the active in situ generated Pd-H catalyst. These studies revealed that the catalytic system is highly dependent on the large steric demand of the P(tBu)(3) ligand. The use of an alternative ligand, cataCXium PinCy, also
作者:Daniela Kampen、Arnaud Ladépêche、Gerrit Claßen、Benjamin List
DOI:10.1002/adsc.200800036
日期:2008.5.5
Aldehydes react with silyl ethers or the corresponding alcohols and allylsilanes in the presence of catalytic amounts of 2,4-dinitrobenzenesulfonic acid (DNBA) to provide a wide range of homoallylic ethers in moderate to high yields.