Palladium acetate was shown to be an extremely active catalyst for the Heck reaction of aryl bromides. Both the base and the solvent were found to have a fundamental influence on the efficiency of the reaction, with K(3)PO(4) and N,N-dimethylacetamide being the optimal base and solvent, respectively.
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http://dx.doi.org/10.1021/jo034646w | DOI Listing |
BMC Neurol
January 2025
Department of Neurology, LMU University Hospital, LMU Munich, Marchioninistrasse 15, 81377, Munich, Germany.
Background: Purulent meningitis poses a significant clinical challenge with high mortality. We present the case of a 54-year-old female transferred to our emergency department with suspected bacterial meningitis, later diagnosed as an Austrian syndrome.
Case Presentation: The patient exhibited subacute somnolence, severe headache, nausea and fever.
Nat Commun
January 2025
College of Chemistry and Life Science, Advanced Institute of Materials Science, Changchun University of Technology, Changchun, P. R. China.
The enantioselective domino Heck/cross-coupling has emerged as a powerful tool in modern chemical synthesis for decades. Despite significant progress in relative rigid skeleton substrates, the implementation of asymmetric Heck/cross-coupling cascades of highly flexible haloalkene substrates remains a challenging and and long-standing goal. Here we report an efficient asymmetric domino Heck/Tsuji-Trost reaction of highly flexible vinylic halides with 1,3-dienes enabled by palladium catalysis.
View Article and Find Full Text PDFCarbohydr Res
January 2025
Department of Organic Chemistry, Faculty of Chemistry, Urmia University, Urmia, Iran. Electronic address:
The Heck reaction is one of the most well-known C-C (carbon-carbon) coupling reactions and was identified with the Nobel Prize in Chemistry in 2010. These reactions have been broadly utilized to prepare a different spectrum of heterocycles with applications in agrochemical and pharmaceutical industries. These reactions are commonly catalyzed by palladium due to its tolerance and expansive variousness of functional groups, which bears a remarkable power in creating C-C bonds.
View Article and Find Full Text PDFDalton Trans
January 2025
Institut de Chimie Moléculaire de Reims - UMR 7312 CNRS-Université de Reims Champagne-Ardenne UFR des Sciences Exactes et Naturelles, BP 1039, 51687 REIMS, Cedex 2, France.
Expression of concern for 'Nanocrystalline starch grafted palladium(II) complex for the Mizoroki-Heck reaction' by Sanny Verma , , 2013, , 14454-14459, https://doi.org/10.1039/C3DT51685G.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
January 2025
Department of Chemistry, Zhejiang University, Hangzhou, 310058, China.
Heck silylation of unactivated alkenes is an efficient strategy for the synthesis of useful organosilicon compounds. However, extensive efforts have been dedicated to only achieving achiral molecules. Herein, a highly regio- and enantioselective cobalt-catalyzed Heck silylation of unactivated alkenes with hydrosilanes is reported for the first time, providing access to axially chiral alkenes in good to excellent yields with 87-98 % ee.
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