- Total Synthesis of the Antidiabetic (Type 2) Lipid Mediator Protectin DX/PDX
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The first total synthesis of a lipid mediator derived from natural ?-3-fatty acid docosahexaenoic acid (DHA), 10S,17S-diHDHA (also referred to as protectin DX/PDX), was achieved in a convergent route (29 steps). The two chiral hydroxyl groups at C-10 and
- Sancéau, Jean-Yves,Maltais, René,Poirier, Donald,Marette, André
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p. 495 - 505
(2019/01/24)
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- PIPERIDINE DERIVATIVES AS LIVER X RECEPTOR β AGONISTS, COMPOSITIONS, AND THEIR USE
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Piperidine compounds of the Formular: (I) and pharmaceutically acceptable salts thereof, wherein X, Y, R 1, R 2, R 3, L, R 4, L 1, Q and R 5 are as defined herein. The compounds and pharmaceutically acceptable compositions comprising a compound thereof, are useful as Liver X-β receptor (LXRβ) agonists, and may be useful for treating or preventing pathologies related thereto. Such pathologies include, but are not limited to, inflammatory diseases and diseases characterized by defects in cholesterol and lipid metabolism, such as Alzheimer's disease.
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Page/Page column 76; 77
(2018/04/27)
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- Synthesis of exo-3-ammo-7-azabicyclo[2.2.1]heptanes as a class of malarial aspartic protease inhibitors: Exploration of two binding pockets
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The increasing prevalence of drug-resisLant strains of malaria-causing Plasmodium parasites necessitates the development of therapeutic agents that inhibit new biochemical targets. We herein describe the design, synthesis, and in vitro evaluation of a class of inhibitors that target the malarial aspartic proteases known as the plasmepsins. The title compounds feature a 7-azanorbornane skeleton that bears an exo-amino function, which was designed to interact with the catalytic dyad of aspartic proteases while providing vectors for the attachment of binding elements that target the flap and S1/S3 binding pockets at. the enzyme active site. Their synthesis takes advantage of a solvent-free and highly diastereoselective conjugate addition of amines to bicyclic vinyl sulfones. Structural optimization based on a little-known conformational preference of aryl sulfones produced the most potent inhibitors of this new class. In vitro assays demonstrate that the title compounds are capable of potent (IC50 ≥ 1.0 nM) inhibition of plasmepsins, while remaining relatively weak inhibitors of the closely related human enzymes cathepsins D and E. The ideal occupation of the flap pocket is crucial for both potency and selectivity over the human proteases. Differently functionalized compounds were synthesized to gain new insights info the molecular recognition properties of this cavity. Wiley-VCH Verlag GmbH & Co. KGaA.
- Zuercher, Martina,Hof, Fraser,Barandun, Luzi,Schuetz, Andri,Schweizer, W. Bernd,Meyer, Solange,Bur, Daniel,Diederich, Francois
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supporting information; experimental part
p. 1707 - 1719
(2009/08/09)
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- On the Double Bond Isostere of the Peptide Bond: Preparation of an Enkephalin Analogue
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Methodology for preparing dipeptide analogues in which a carbon -carbon double bond replaces the normal amide bond is described.Thus, the protected tyrosylglycine analogue, (S)-trans-5-t-butyloxycarbonylamino-6-(4-t-butoxyphenyl)hex-3-enoic acid has been synthesised and incorporated into the Leu-enkephalin analogue (3) by condensation with glycylphenylalanyl-leucine.The enkephalin analogue retained biological activity.The significance of this isosteric replacement of the amide group is discussed.
- Hann, Michael M.,Sammes, Peter G.,Kennewell, Peter D.,Taylor, John B.
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p. 307 - 314
(2007/10/02)
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