[EN] PYRIDINONE AND PYRIMIDINONE DERIVATIVES AS FACTOR XIA INHIBITORS<br/>[FR] DÉRIVÉS DE PYRIDINONE ET DE PYRIMIDINONE COMME INHIBITEURS DU FACTEUR XIA
申请人:ONO PHARMACEUTICAL CO
公开号:WO2013093484A1
公开(公告)日:2013-06-27
The present invention provides compounds of the general formula (I), their salts and N- oxides, and solvates and prodrugs thereof (wherein the characters are as defined in the description). The compounds of the general formula (I) are inhibitors of Factor XIa, so that they are useful in the prevention of and/or therapy for thromboembolic diseases.
Treat me gently: For a selective synthesis of the unusually sensitive cyclophanic α‐pyrone neurymenolide A, the chosen catalysts must be able to distinguish between six different sites of unsaturation, without scrambling any of the skipped π systems. This challenge was met with a new gold‐catalyzed pyrone synthesis in combination with a molybdenum‐catalyzed ring‐closing alkyne metathesis.
Synthesis of the bis-potassium salts of 5-hydroxy-3-oxopent-4-enoic acids and their use for the efficient preparation of 4-hydroxy-2H-pyran-2-ones and other heterocycles
5-Hydroxy-3-oxopent-4-enoic acid esters can be efficiently transformed into the stable bis-potassium salts of the corresponding 5-hydroxy-3-oxopent-4-enoic acids, from which the sensitive acids are released in situ, the latter being converted into substituted 4-hydroxy-2H-pyran-2-ones, pyrazoles and isoxazoles under mild conditions; the efficiency of this method is demonstrated by the first synthesis
Gold(I)-Catalyzed Intermolecular Rearrangement Reaction of Glycosyl Alkynoic β-Ketoesters for the Synthesis of 4-<i>O</i>-Glycosylated 2-Pyrones
作者:Rongkun Liu、Xiaoqian Li、Xiaona Li、Jiazhe Wang、You Yang
DOI:10.1021/acs.joc.9b01582
日期:2019.11.1
A new gold(I)-catalyzed rearrangement reaction with glycosyl alkynoic β-ketoesters as substrates is developed. The rearrangement reactions under the catalysis of PPh3AuOTf proceeded smoothly to afford a range of 4-O-glycosylated 2-pyrones. Based on the isolation of the 4-hydroxy-2-pyrone derivative generated from the departure of the leaving group and the competitive reaction, a plausible mechanism
3‐Oxo‐5‐alkynoic acid esters, on treatment with a carbophilic catalyst, undergo 6‐endo‐digcyclizationreactions to furnish either 2‐pyrones or 4‐pyrones in high yields. The regiochemical course can be dialed in by the proper choice of the alcohol part of the ester and the π‐acid. This transformation is compatible with a variety of acid‐sensitive groups as witnessed by a number of exigent applications