Synthesis of Hexahydrocyclopenta[c]furans by an Intramolecular Iron-Catalyzed Ring Expansion Reaction
作者:Gerhard Hilt、Patrick Bolze、Maja Heitbaum、Katrin Hasse、Klaus Harms、Werner Massa
DOI:10.1002/adsc.200700035
日期:2007.8.6
The intramolecular iron-catalyzed ring expansionreaction of epoxyalkenes was investigated with a preformed iron(salen) [Fe(Salen)] complex. The formal insertion of the alkene into the epoxide generated hexahydrocyclopenta[c]furan derivatives in moderate to good yields and diastereoselectivities depending on other functional groups present in the starting materials. In addition, oxygen-tethered epoxyalkenes
用预先形成的铁(salen)[Fe(Salen)]配合物研究了环氧烯烃的分子内铁催化的环膨胀反应。取决于起始原料中存在的其他官能团,烯烃以中等至良好的产率和非对映选择性正式插入环氧化物生成的六氢环戊[ c ]呋喃衍生物中。另外,将氧束缚的环氧烯烃用于木脂素异构体的合成。讨论了Fe(Salen)催化反应过程的范围和局限性。
[EN] 2-ACYLAMINOPROPOANOL-TYPE GLUCOSYLCERAMIDE SYNTHASE INHIBITORS<br/>[FR] INHIBITEURS DE GLUCOSYLCÉRAMIDE SYNTHASE DE TYPE 2-ACYLAMINOPROPOANOL
申请人:GENZYME CORP
公开号:WO2010039256A1
公开(公告)日:2010-04-08
A compound for use in treating polycystic kidney disease is represented by Structural Formula (I): or a pharmaceutically acceptable salt thereof. A pharmaceutical composition comprises a compound represented by Structural Formula (I) or a pharmaceutically acceptable salt thereof. A method of treating polycystic kidney disease in a subject in need thereof comprises administering to the subject a therapeutically effective amount of a compound represented by Structural Formula (I) or a pharmaceutically acceptable salt thereof. Methods of treating in polycystic kidney disease in a subject in need thereof respectively comprise administering to the subject a therapeutically effective amount of a compound represented by Structural Formula (I) or a pharmaceutically acceptable salt thereof.
practical access for the modification of complex natural products. Preliminary mechanistic studies demonstrate that the key O-centered radicals mediate the sequential ring cleavage and allylation/formylation.
Enantioselective Synthesis of 2,6-<i>cis</i>-Disubstituted Tetrahydropyrans via a Tandem Catalytic Asymmetric Hydrogenation/Oxa-Michael Cyclization: An Efficient Approach to (−)-Centrolobine
A highly efficient one-pot process via a tandemreaction of catalytic asymmetric hydrogenation and oxa-Michael cyclization for the synthesis of 2,6-cis-disubstituted tetrahydropyrans has been developed (ee up to 99.9%, cis/trans-selectivity up to 99:1). This method provides a concise route to (−)-centrolobine (68.8% yield, three steps).
A compound for use in treating polycystic kidney disease is represented by Structural Formula (I): or a pharmaceutically acceptable salt thereof. A pharmaceutical composition comprises a compound represented by Structural Formula (I) or a pharmaceutically acceptable salt thereof. A method of treating polycystic kidney disease in a subject in need thereof comprises administering to the subject a therapeutically effective amount of a compound represented by Structural Formula (I) or a pharmaceutically acceptable salt thereof. Methods of treating in polycystic kidney disease in a subject in need thereof respectively comprise administering to the subject a therapeutically effective amount of a compound represented by Structural Formula (I) or a pharmaceutically acceptable salt thereof.