[EN] DNA ALKYLATION AND CROSS-LINKING AGENTS AS COMPOUNDS AND PAYLOADS FOR TARGETED THERAPIES [FR] ALKYLATION D'ADN ET AGENTS DE RÉTICULATION COMME COMPOSÉS ET CHARGES UTILES POUR THÉRAPIES CIBLÉES
Desymmetrization of<i>meso</i>-2,5-Diallylpyrrolidinyl Ureas through Asymmetric Palladium-Catalyzed Carboamination: Stereocontrolled Synthesis of Bicyclic Ureas
作者:Nicholas R. Babij、John P. Wolfe
DOI:10.1002/anie.201302720
日期:2013.8.26
Lost symmetry: Fused bicyclic ureas are enantioselectively obtained through Pd‐catalyzed desymmetrizing carboaminations of meso‐2,5‐diallylpyrrolidinyl ureas (see scheme). The reactions generate a CN and a CC bond, and afford products with three stereocenters. One of these products was transformed to a tricyclic guanidine and then to 9‐epi‐batzelladine K over several steps.
失去对称性:通过 Pd 催化的内消旋-2,5-二烯丙基吡咯烷基脲的去对称碳胺化反应对映选择性地获得稠合双环脲(参见方案)。反应生成 C N 和 C C 键,并提供具有三个立体中心的产物。其中一个产物经过几个步骤转化为三环胍,然后转化为 9- epi- batzelladine K。
A Versatile Enantioselective Synthesis of Azabicyclic Ring Systems: A Concise Total Synthesis of (+)-Grandisine D and Unnatural Analogues
作者:Olugbeminiyi O. Fadeyi、Timothy J. Senter、Kristopher N. Hahn、Craig W. Lindsley
DOI:10.1002/chem.201200629
日期:2012.5.7
new six step approach for the rapid and enantioselective synthesis of indolizidine, pyrrolo[1,2‐a]azepine, and pyrrolo[1,2‐a]azocine azabicyclic systems and their respective lactam congeners, which are found in a host of natural products as well as pharmaceutical preparations. This protocol enables a concise enantioselective total synthesis of (+)‐grandisine D in 16.4 % overall yield from commercial
结束对氮杂辛类的研究:我们开发了一种新的六步法,用于快速和对映选择性合成吲哚里西啶、吡咯并[1,2- a ]氮杂和吡咯并[1,2- a ]氮杂双环系统及其各自的内酰胺同系物,它们存在于许多天然产品和药物制剂中。该方案能够从商业材料中以 16.4% 的总产率对 (+)-大地碱 D 进行简明的对映选择性全合成(参见方案)。