enantioselective Negishi cross‐coupling reaction, and the first arylation of α‐halo esters with arylzinc halides, are disclosed. Employing a cobalt‐bisoxazoline catalyst, various α‐arylalkanoic esters were synthesized in excellent enantioselectivities and yields (up to 97 % ee and 98 % yield). A diverse range of functional groups, including ether, halide, thioether, silyl, amine, ester, acetal, amide, olefin
Cycloalkyl, lactam, lactone and related compounds, pharmaceutical compositions comprising same, and methods for inhibiting beta-amyloid peptide release and/or its synthesis by use of such compounds
申请人:——
公开号:US20020045747A1
公开(公告)日:2002-04-18
Disclosed are compounds which inhibit &bgr;-amyloid peptide release and/or its synthesis, and, accordingly, have utility in treating Alzheimer's disease. Also disclosed are pharmaceutical compositions comprising a compound which inhibits &bgr;-amyloid peptide release and/or its synthesis as well as methods for treating Alzheimer's disease both prophylactically and therapeutically with such pharmaceutical compositions.
cobalt-bisoxazoline catalyst and afforded various α-alkyl-β,γ-unsaturated esters with excellent enantioselectivities and moderate to good yields (≤95% ee and ≤82% yields). The formal synthesis of the Californiaredscalepheromone using this method was investigated, and radical clock experiments were performed.
Heterocyclic compounds, pharmaceutical compositions comprising same, and methods for inhibiting &bgr;-amyloid peptide release and/or its synthesis by use of such compounds
申请人:Athena Neurosciences, Inc.
公开号:US06506782B1
公开(公告)日:2003-01-14
Disclosed are compounds which inhibit &bgr;-amyloid peptide release and/or its synthesis, and, accordingly, have utility in treating Alzheimer's disease. Also disclosed are pharmaceutical compositions comprising a compound which inhibits &bgr;-amyloid peptide release and/or its synthesis as well as methods for treating Alzheimer's disease both prophylactically and therapeutically with such pharmaceutical compositions.
Recyclable Ruthenium Catalyst for Distal
<i>meta</i>
‐C−H Activation
作者:Isaac Choi、Valentin Müller、Yanhui Wang、Kai Xue、Rositha Kuniyil、Loren B. Andreas、Volker Karius、Johan G. Alauzun、Lutz Ackermann
DOI:10.1002/chem.202003622
日期:2020.11.26
unprecedented hybrid‐ruthenium catalysis for distal meta‐C−H activation. The hybrid‐ruthenium catalyst was recyclable, as was proven by various heterogeneity tests, and fully characterized with various microscopic and spectroscopic techniques, highlighting the physical and chemical stability. Thereby, the hybrid‐ruthenium catalysis proved broadly applicable for meta‐C−Halkylations of among others purine‐based