Cinnamic aldehyde derived probes for the active site labelling of pathogenesis associated enzymes
作者:Maximilian Pitscheider、Stephan A. Sieber
DOI:10.1039/b905527d
日期:——
Michael acceptor based natural product derived probes are selective and sensitive chemical tools for the identification and characterization of pathologically relevant enzymes in MRSA.
The One-Pot Wittig Reaction: A Facile Synthesis of α,β-Unsaturated Esters and Nitriles by Using Nanocrystalline Magnesium Oxide
作者:Boyapati M. Choudary、Koosam Mahendar、M. Lakshmi Kantam、Kalluri V. S. Ranganath、Taimur Athar
DOI:10.1002/adsc.200606001
日期:2006.9
Nanocrystalline magnesium oxide was found to be an effective heterogeneous, solid base catalyst for the one-pot Wittig reaction to afford α,β-unsaturatedesters and nitriles in excellent yields with high E-stereoselectivity in the presence of triphenylphosphine under mild conditions.
Pd doped SiO<sub>2</sub> nanoparticles: an efficient recyclable catalyst for Suzuki, Heck and Sonogashira reactions
作者:Deepali A. Kotadia、Urmila H. Patel、Sahaj Gandhi、Saurabh S. Soni
DOI:10.1039/c4ra01813c
日期:——
doped silica (Pd/SiO2) mesoporous material was synthesized via the sol–gel route using the P123 triblock copolymer as a structure directing agent. Pd/SiO2 was efficiently used as a catalyst for Suzuki, Heck and Sonogashira reactionsundermicrowaveirradiation. The catalyst exhibited high activity for all the couplingreactions and can be recycled nine times without a significant loss in its catalytic activity
Tridentate SCS Palladium(II) Complexes: New, Highly Stable, Recyclable Catalysts for the Heck Reaction
作者:David E. Bergbreiter、Philip L. Osburn、Yun-Shan Liu
DOI:10.1021/ja991099g
日期:1999.10.1
A new pincer-type SCS ligand containing Pd(II) is a simple, robust catalyst for Heck chemistry using a variety of alkene acceptors and aryl iodides. It is less active with aryl bromides. While certain palladium(II) species insert slowly into the aryl C−H bond of an unsubstituted version of this ligand, the introduction of activating groups into the 5 position of the aromatic ring readily allows quantitative
Time-dependent stereoselective Heck reaction using mesoporous Pd/TiO<sub>2</sub>nanoparticles catalyst under sunlight
作者:Saurabh S. Soni、Deepali A. Kotadia
DOI:10.1039/c3cy00602f
日期:——
Pd(0)-doped mesoporous TiO2 nanoparticles (Pd/TiO2) have been synthesized using an EISA method. The catalytic activity of Pd/TiO2 nanoparticles (NPs) is significantly enhanced under solar light irradiation for the Heck reaction. The Heck coupling product gives a considerable amount of Z-isomer, due to photochemical isomerization of the initially formed E-isomer, providing a facility for the time-dependent selectivity of E/Z-isomers under sunlight at ambient conditions.