An Isomünchnone-Based Method for the Synthesis of Highly Substituted 2(1H)-Pyridones
摘要:
1-(Benzenesulfonyl-diazoacetyl)-pyrrolidin-2-one was prepared by a diazo transfer of 1-(benzenesulfonylacetyl)-pyrrolidin-2-one with p-acetamidobenzenesulfonyl azide and triethylamine. Treatment; of the diazoimide with a catalytic quantity of rhodium(II) acetate resulted in the formation of an isomunchnone dipole, which underwent bimolecular trapping with various dipolarophiles in high yield. The initially formed cycloadducts were not isolable or observed, as they all readily underwent ring opening to give the 3-hydroxy-2(1H)-pyridone ring system. The 3-hydroxy-2(1H)-pyridones were readily converted to the corresponding triflates, which function as suitable substrates in various types of palladium-catalyzed cross-coupling reactions. Commercial tetrakis(triphenylphoshine)palladium was found to be a particularly effective catalyst for the cross-coupling with aryl, vinyl, and acetylenic partners. An application of the method to the synthesis of the indolizidine alkaloid (+/-)-ipalbidine was carried out in eight steps in 17% overall yield. The angiotensin-converting enzyme inhibitor (-)-A58365A was also synthesized by a process based on the [3 + 2]-cycloaddition reaction of a phenylsulfonyl substituted isomunchnone intermediate. The starting material for this process was prepared from L-pyroglutamic acid and involved using a diazo phenylsulfonyl substituted pyrrolidine imide. Treatment of the diazoimide with Rh-2(OAc)(4) in the presence of methyl vinyl ketone afforded a 3-hydroxy-2-pyridone derivative, which was subsequently converted to the ACE inhibitor in six additional steps.
[EN] Amide compounds and uses thereof<br/>[FR] COMPOSÉS AMIDES ET LEURS UTILISATIONS
申请人:HUTCHISON MEDIPHARMA LTD
公开号:WO2021197276A1
公开(公告)日:2021-10-07
Provided herein are novel amide compounds of formula (I), pharmaceutical compositions comprising same, methods for preparing same, and uses thereof, wherein the definition of each symbol is as described in the description.
[EN] SUBSTITUTED PYRIDONE DERIVATIVES AS PDE10 INHIBITORS<br/>[FR] DÉRIVÉS DE PYRIDONE SUBSTITUÉS UTILISÉS EN TANT QU'INHIBITEURS DE PDE10
申请人:MERCK SHARP & DOHME
公开号:WO2014081617A1
公开(公告)日:2014-05-30
The present invention is directed to substituted pyridinone compounds which are useful as therapeutic agents for the treatment of central nervous system disorders associated with phosphodiesterase 10 (PDE10). The present invention also relates to the use of such compounds for treating neurological and psychiatric disorders, such as schizophrenia, psychosis or Huntington's disease, and those associated with striatal hypofunction or basal ganglia dysfunction.
[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.
Chemokine receptor antagonists, in particular, compounds of Formula (I-A) that act as antagonists of the chemokine CCR2 receptor, including pharmaceutical compositions and uses thereof to treat or prevent diseases associated with monocyte accumulation, lymphocyte accumulation or leukocyte accumulation are described herein.
[EN] CAMPTOTHECIN ANALOGS AS POTENT INHIBITORS OF HUMAN COLORECTAL CANCER
申请人:RESEARCH TRIANGLE INSTITUTE
公开号:WO1991005556A1
公开(公告)日:1991-05-02
(EN) A method for synthesizing camptothecin and camptothecin analogs using a novel hydroxyl-containing tricyclic intermediate and the camptothecin analogs produced by the process. The camptothecin analogs are effective inhibitors of topoisomerase I and show anti-leukemic and anti-tumor activity.(FR) L'invention se rapporte à un procédé de synthèse de camptothécine et d'analogues de camptothécine qui utilise un nouvel intermédiaire tricyclique contenant de l'hydroxyle, ainsi qu'aux analogues de camptothécine ainsi produits. Ces analogues de camptothécine sont des inhibiteurs efficaces de la topo-isomérase I et présentent des propriétés anti-leucémiques et anti-tumorales.