Functionalized Ionic Liquid as an Efficient and Recyclable Reaction Medium for Phosphine-Free Palladium-Catalyzed Heck Reaction
作者:Lei Wang、Li Zhou
DOI:10.1055/s-2006-942466
日期:2006.8
functionalized ionicliquid, 1-(2-hydroxyethyl)-3-methylimidazolium tetrafluoroborate ([HEmim][BF 4 ]), was found to be as an efficient and recyclablereactionmedium for palladium-catalyzed Heck reaction. The olefination of iodoarenes and bromoarenes with olefins generated the corresponding products in good to excellent yields under phosphine-free reaction conditions. The reaction involved the use
Substituted CIS- and trans-stilbenes as therapeutic agents
申请人:Vander Jagt David L.
公开号:US20070249647A1
公开(公告)日:2007-10-25
The present invention relates to method(s) of treating a subject afflicted with cancer or a precancerous condition, an inflammatory disease or condition, and/or stroke or other ischemic disease or condition, the method comprising administering to the subject or patient in need a composition comprising a therapeutically effective amount of a substituted cis or trans-stilbene.
solvents; however, the rate of reaction was significantly faster in the presence of water. Thermal stability evaluation of the postreaction mixtures in DMSO and 3:1 DMSO/water by differential scanning calorimetry indicated that the onset temperatures of thermaldecomposition were significantly lower than that of neat DMSO. Evaluation of the substrate scope revealed that the substitution pattern on the bromobenzene
E-selective isomerization of stilbenes and stilbenoids through reversible hydroboration
作者:Erin E. Gray、Lake E. Rabenold、Brian C. Goess
DOI:10.1016/j.tetlet.2011.09.046
日期:2011.11
Hydroboration of a mixture of E and Z stilbenes and stilbenoids is followed by an elimination reaction to yield the E isomer with high stereoselectivity. The reaction tolerates aromatic substituents with varying stereoelectronic properties, occurs in one pot, and requires only commercially available reagents. An illustration of the isomerization reaction in a synthesis of resveratrol, a biologically
Palladium Complexes with Phenoxy- and Amidate-Functionalized N-Heterocyclic Carbene Ligands Based on 3-Phenylimidazo[1,5-<i>a</i>]pyridine: Synthesis and Catalytic Application in Mizoroki–Heck Coupling Reactions with Ortho-Substituted Aryl Chlorides
作者:Cheng-Hau Hung、Wei-Yuan Zheng、Hon Man Lee
DOI:10.1021/acs.organomet.0c00791
日期:2021.3.22
the best activities, capable of the activation of deactivated arylchlorides as substrates with a low Pd atom loading. Even challenging sterically demanding ortho-substituted arylchlorides were successfully utilized as substrates. The studies revealed that the robustness of the catalyst precursor is crucial in delivering high catalytic activities. Also, the promising use of tetranuclear palladium