4-dicarboxaldehyde generated a new covalentorganicframework, COF-ASB (1), in which the organic units are held together via hydrazone linkage to form porous frameworks. COF-ASB (1) is highly crystalline and displays good chemical and thermal stability and is permanently porous. In addition, 1 can be an ideal support to load Ru nanoparticles (Ru NPs) to generate [email protected] (2). The obtained composite
Recyclable hydrotalcite catalysts for alcohol imination via acceptorless dehydrogenation
作者:John Bain、Philip Cho、Adelina Voutchkova-Kostal
DOI:10.1039/c5gc00312a
日期:——
Intrinsic catalytic activity of a series of hydrotalcite-like materials towards acceptorless alcohol dehydrogenation and one-pot imination.
一系列类水滑石材料对无受体醇脱氢和一锅法亚胺化的固有催化活性。
Chiral Phosphoric Acid-Catalyzed Enantioselective Three-Component Povarov Reaction Using Enecarbamates as Dienophiles: Highly Diastereo- and Enantioselective Synthesis of Substituted 4-Aminotetrahydroquinolines
A chiralphosphoric acid (5)-catalyzed three-componentPovarovreaction of aldehydes 2, anilines 3, and enecarbamates 4 afforded cis-4-amino-2-aryl(alkyl)-1,2,3,4-tetrahydroquinolines 1 in high yields with excellent diastereoselectivities (>95%) and almost complete enantioselectivities (up to >99% ee). The reaction was applicable to a wide range of anilines bearing electron-donating (OMe) and electron-withdrawing
Visible-Light-Induced Radical Acylation of Imines with α-Ketoacids Enabled by Electron-Donor–Acceptor Complexes
作者:Hong-Hao Zhang、Shouyun Yu
DOI:10.1021/acs.orglett.9b01169
日期:2019.5.17
radical acylation of imines with α-ketoacids has been achieved, enabled by an electron-donor–acceptor (EDA) complex. This EDA complex-mediated process eradicates the use of a photocatalyst. Visiblelight is used as the sole promoter for this reaction, and CO2 is the only side product. Substrates with amide, cyanide, ester, ether, halides, and heterocycles were compatible. This radical acylation allows
Identification and optimisation of 3,3-dimethyl-azetidin-2-ones as potent and selective inhibitors of 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1)
作者:William McCoull、Martin Augustin、Caroline Blake、Anne Ertan、Elaine Kilgour、Stephan Krapp、Jane E. Moore、Nicholas J. Newcombe、Martin J. Packer、Amanda Rees、John Revill、James S. Scott、Nidhal Selmi、Stefan Gerhardt、Derek J. Ogg、Stefan Steinbacher、Paul R. O. Whittamore
DOI:10.1039/c3md00234a
日期:——
3,3-Di-methyl-azetidin-2-ones were identified as potent and selective 11β-HSD1 inhibitors against the human and mouse forms of the enzyme. Structure guided optimisation of LLE was conducted, utilising a key polar interaction and identifying stereochemical preference for the 4S isomer. Metabolic stability was improved to afford oral exposure, providing tool compounds suitable for pre-clinical evaluation