Hydrogen Peroxide Promoted Mizoroki–Heck Reactions of Phenyldiazenes with Acrylates, Acrylamides, and Styrenes
作者:Roman Lasch、Stefanie K. Fehler、Markus R. Heinrich
DOI:10.1021/acs.orglett.6b00449
日期:2016.4.1
generation of phenyldiazenes from azocarboxylates allowed clean and selective reactions with styrenes, acrylates, and acrylamides using palladium(II) acetate in the presence of silver(I) acetate or hydrogen peroxide as oxidant. Hydrogen peroxide was thereby shown to be a cheap and broadly applicable alternative for the established palladium–silver(I) system.
α,β-Unsaturated primary amides have found numerous applications in drug development, organic materials, and polymer sciences. However, the catalytic synthesis of α,β-unsaturated primary amides via carbonylation of alkynes has long been an elusive endeavor. Here, we report a novel palladium-catalyzed hydroaminocarbonylation of alkynes with NH4Cl as the amine source, enabling the highly chemo- and regioselective
Design, Synthesis, and Structure–Activity Relationship Studies of Dual Inhibitors of Soluble Epoxide Hydrolase and 5-Lipoxygenase
作者:Kerstin Hiesinger、Jan S. Kramer、Sandra Beyer、Timon Eckes、Steffen Brunst、Cathrin Flauaus、Sandra K. Wittmann、Lilia Weizel、Astrid Kaiser、Simon B. M. Kretschmer、Sven George、Carlo Angioni、Jan Heering、Gerd Geisslinger、Manfred Schubert-Zsilavecz、Achim Schmidtko、Denys Pogoryelov、Josef Pfeilschifter、Bettina Hofmann、Dieter Steinhilber、Stephanie Schwalm、Ewgenij Proschak
DOI:10.1021/acs.jmedchem.0c00561
日期:2020.10.22
Inhibition of multiple enzymes of the arachidonic acid cascade leads to synergistic anti-inflammatory effects. Merging of 5-lipoxygenase (5-LOX) and soluble epoxide hydrolase (sEH) pharmacophores led to the discovery of a dual 5-LOX/sEH inhibitor, which was subsequently optimized in terms of potency toward both targets and metabolic stability. The optimized lead structure displayed cellular activity
The acid-mediated ring opening reactions of α-aryl-lactams
作者:Frank D. King、Stephen Caddick
DOI:10.1039/c2ob00012a
日期:——
4-Aryl-azetidin-2-ones (β-lactams) undergo ring opening with triflic acid to give cinnamamides which, in benzene, react further to give 3-aryl-3-phenyl-propionamides. Prolonged reaction times in benzene give 3,3-diphenyl-propionamide via an aryl/phenyl exchange. Lactams of ring size 7 and higher also ring open, but only 7- and 8-membered rings give pure diphenylalkylamides. AlCl3 only ring opens the 4-aryl-azetidinones.