Synthesis of Peroxylactones Using Mn(III)-Catalyzed Aerobic Oxidation
摘要:
The aerobic oxidation of tetronic acid in the presence of 1,1-disubstituted alkenes afforded hydroperoxyethyl-peroxylactones, while a similar reaction using 3-alkyl-substituted tetronic acids gave stable crystalline peroxylactones in good to excellent yields. The oxidation using a stoichiometric amount of manganese(III) acetate did not give the bicyclic lactone but the ethenyland/or ethyl-tetronic acid derivatives.
Cyclopentanone derivatives, method of synthesis and uses thereof
申请人:Neuropharma S.A.
公开号:EP1939192A1
公开(公告)日:2008-07-02
The present invention relates to cyclopentanone derivatives of formula (I), their method of synthesis and uses thereof. Concretely, the compounds disclosed have proved to be inhibitors of glycogen synthase kinase 3β, GSK-3 β, which is known to be involved in different disease and conditions, such as Alzheimer's disease or non-insulin dependent diabetes mellitus. The present invention also relates to pharmaceutical compositions comprising the same. Further, the present invention is directed to the use of the compounds in the manufacture of a medicament for the treatment and/or prevention of a GSK-3 mediated disease or condition.
Direct catalytic asymmetric synthesis of highly functionalized tetronic acids/tetrahydro-isobenzofuran-1,5-diones via combination of cascade three-component reductive alkylations and Michael-aldol reactions
作者:Dhevalapally B. Ramachary、Mamillapalli Kishor
DOI:10.1039/c003588b
日期:——
A practical and sustainable chemical process for the synthesis of highly substituted tetrahydro-isobenzofuran-1,5-diones was achieved for the first time through asymmetric cascade Michael-aldol reaction of 4-hydroxy-3-alkyl-5H-furan-2-ones with alkyl vinyl ketones in the presence of a catalytic amount of L-proline or 9-amino-9-deoxyepiquinine/TCA. In this article, we discovered for the first time the
A Novel Class of Cyclic .beta.-Dicarbonyl Leaving Groups and Their Use in the Design of Benzisothiazolone Human Leukocyte Elastase Inhibitors
作者:Dennis J. Hlasta、James H. Ackerman、John J. Court、Robert P. Farrell、Judith A. Johnson、James L. Kofron、David T. Robinson、Timothy G. Talomie、Richard P. Dunlap、Catherine A. Franke
DOI:10.1021/jm00023a008
日期:1995.11
Humanleukocyteelastase (HLE) has been proposed to be a primary mediator of pulmonary emphysema, and inhibitors of this enzyme should be effective in the treatment of emphysema and other pulmonary diseases. We have discovered a novel class of alicyclic and heterocyclic leavinggroups which share one common structural feature, a cyclic beta-dicarbonyl. This design concept for leavinggroups has not
The present invention relates to an isoxazoline derivative as an inhibitor against various caspases, a process for preparing the same, and a therapeutic composition for preventing inflammation and apoptosis comprising the same
Electrochemical Generation of Peroxy Radicals and Subsequent Peroxidation of 1,3-Dicarbonyls in an Undivided Cell
作者:Oleg V. Bityukov、Ksenia V. Skokova、Vera A. Vil’、Gennady I. Nikishin、Alexander O. Terent’ev
DOI:10.1021/acs.orglett.3c03780
日期:2024.1.12
The generation of peroxy radicals from hydroperoxides with subsequent selective peroxidation of 1,3-dicarbonyls in an undivided electrochemical cell under constant current conditions is reported. The method provides a variety of peroxy-containing barbituric acids and 4-hydroxy-2(5H)-furanones with yields of up to 74%. Only the combination of anodic and cathodic processes provides efficient peroxidation