A Scalable Synthesis of (<i>R</i>,<i>R</i>)-2,6-Dimethyldihydro-2<i>H</i>-pyran-4(3<i>H</i>)-one
作者:Ian S. Young、Matthew W. Haley、Annie Tam、Steven A. Tymonko、Zhongmin Xu、Ronald L. Hanson、Animesh Goswami
DOI:10.1021/op500135x
日期:2015.10.16
Kulinkovich cyclopropanation of silyl protected (R)-ethyl 3-hydroxybutanoate, and subsequent oxidative fragmentation of the cyclopropanol. The resulting vinyl ketone intermediate was then subjected to oxidative Heck cyclization to form the enone substrate required for conjugate addition. A diastereoselective copper-catalyzed Grignard addition procedure was implemented to install the requisite methyl
报道了(R,R)-2,6-二甲基二氢-2 H-吡喃-4(3 H)-one的可扩展合成。该策略的关键是Ti(O i Pr)4催化的甲硅烷基保护的Kulinkovich环丙烷化(R)-3-羟基丁酸乙酯,随后环丙醇的氧化裂解。然后将所得的乙烯基酮中间体进行氧化Heck环化反应以形成共轭物添加所需的烯酮底物。实施了非对映选择性铜催化的格氏试剂加成步骤,以安装必需的甲基,其中包括1,3-双(二苯基膦基)丙烷和三甲基甲硅烷基氯,大大提高了该方法的耐用性。
[EN] NOVEL IMIDAZO[4,5-C]QUINOLINE DERIVATIVES AS LRRK2 INHIBITORS<br/>[FR] NOUVEAUX DÉRIVÉS IMIDAZO[4,5-C]QUINOLÉINE UTILISÉS EN TANT QU'INHIBITEURS DE LRRK2
申请人:PFIZER
公开号:WO2018163066A1
公开(公告)日:2018-09-13
The present invention provides novel imidazo[4,5-c]quinoline derivatives of Formula (I), and the pharmaceutically acceptable salts thereof I wherein R1, R2 and R3 are as defined in the specification. The invention is also directed to pharmaceutical compositions comprising the compounds of Formula I and to use of the compounds in the treatment of diseases associated with LRRK2, such as neurodegenerative diseases including Parkinson's disease or Alzheimer's disease, cancer, Crohn's disease or leprosy.
[EN] THIOPHENE- SUB STITUED TETRACYCLIC COMPOUNDS AND METHODS OF USE THEREOF FOR THE TREATMENT OF VIRAL DISEASES<br/>[FR] COMPOSÉS TÉTRACYCLIQUES À SUBSTITUTION THIOPHÈNE ET LEURS PROCÉDÉS D'UTILISATION POUR LE TRAITEMENT DES MALADIES VIRALES
申请人:MERCK SHARP & DOHME
公开号:WO2014110688A1
公开(公告)日:2014-07-24
Disclosed are novel Thiophene-Subsituted Tetracyclic Compounds of Formula (I). And pharmaceutically acceptable salts thereof, wherein A, A', R2, R3, R4 and R5 are as defined herein. The compositions comprising at least one Thiophene-Subsituted Tetracyclic Compounds, and methods of using the Thiophene-Subsituted Tetracyclic Compounds for treating or preventing HCV infection in a patient are also disclosed.
[EN] THIOPHENE-SUBSTITUTED TETRACYCLIC COMPOUNDS AND METHODS OF USE THEREOF FOR TREATMENT OF VIRAL DISEASES<br/>[FR] COMPOSÉS TÉTRACYCLIQUES À SUBSTITUTION THIOPHÈNE ET LEURS MÉHODES D'UTILISATION POUR LE TRAITEMENT DE MALADIES VIRALES
申请人:MERCK SHARP & DOHME
公开号:WO2014110706A1
公开(公告)日:2014-07-24
Thiophene-substituted tetracyclic compounds of formula (I) and pharmaceutically acceptable salts thereof, wherein A, A', R2, R3, R4 and R5 are as defined herein. The compositions comprising at least one thiophene-substituted tetracyclic compound, and methods of using the thiophene-substituted tetracyclic compounds for treating or preventing HCV infection in a patient are also provided.
Routes for the Synthesis of (2<i>S</i>)-2-Methyltetrahydropyran-4-one from Simple Optically Pure Building Blocks
作者:Kevin R. Anderson、Stéphanie L. G. Atkinson、Takahiro Fujiwara、Melvyn E. Giles、Takaji Matsumoto、Eric Merifield、John T. Singleton、Takao Saito、Tsukasa Sotoguchi、James A. Tornos、Edward L. Way
DOI:10.1021/op900163a
日期:2010.1.15
Routes to (2S)-2-methyltetrahydropyran-4-one of high optical purity starting from readily available chiral pool precursors and suitable for large-scale manufacture are described. In one approach, the key step is cyclisation of (S)-5-hydroxyhex-1-en-3-one, derived either from an alkyl (S)-3-hydroxybutyrate or (S)-propylene oxide. Formation of the tetrahydropyran ring directly via an intramolecular oxy-Michael