Nickel(II)‐Catalyzed Diastereo‐ and Enantioselective Michael/ Hemiacetalization Cascade Reaction of α‐Ketoesters with 2‐(2‐Nitrovinyl)phenols
作者:Long Chen、Wu‐Lin Yang、Jia‐Huan Shen、Wei‐Ping Deng
DOI:10.1002/adsc.201900753
日期:2019.10.8
A nickel(II)/diamine‐catalyzed diastereo‐ and enantioselective Michael/hemiacetalization cascade reaction of α‐ketoesters with 2‐(2‐nitrovinyl)phenols has been established, thus providing a range of structurally diverse polysubstituted chromanes in good yields and excellent stereoselectivities (up to 89% yield, >20:1 dr, >99% ee). Moreover, the gram‐scale experiment was performed with only 0.5 mol%
Nickel(II)-Catalyzed Diastereo- and Enantioselective [3+2] Cycloaddition of α-Ketoesters with 2-Nitrovinylindoles and 2-Nitrovinylpyrroles
作者:Wu-Lin Yang、Zhong-Tao Sun、Hao Sun、Wei-Ping Deng
DOI:10.1002/cjoc.201800572
日期:2019.3
The catalyticasymmetric [3+2] cycloaddition of α‐ketoesters with 2‐nitrovinylindoles and 2‐nitrovinyl‐ pyrroles has been established. This strategy allowed the construction of structurally diverse pyrrolo[1,2‐a]indoles bearing three contiguous stereocenters in generally high yields and good to excellent stereoselectivities (up to 98% yield, > 98 : 2 dr, 99% ee). The efficient synthesis of tetracyclic
建立了α-酮酸酯与2-硝基乙烯基吲哚和2-硝基乙烯基吡咯的催化不对称[3 + 2]环加成反应。该策略允许构建具有三个连续立体中心的结构多样的吡咯并[1,2- a ]吲哚,且通常具有高产率和良好至优异的立体选择性(产率高达98%,> 98:2 dr,99%ee)。通过环加合物的衍生化有效合成四环精神化合物类似物显示了该策略的巨大合成潜力。
A visible-light-promoted aerobic C–H/C–N cleavage cascade to isoxazolidine skeletons
The bicyclic isoxazolidine scaffolds are the ubiquitously recurring motifs in alkaloids. Despite of their facile biosynthesises in nature, the laboratory synthesis of these derivatives is still complicated. In this paper, the isoxazolidine derivatives are concisely constructed in one process with excellent stereoselectivity from simple tertiary amines through a C–H activation-retro-aza-Michael-oxidation-cyclization
ORALLY AVAILABLE VIRIDIOFUNGIN DERIVATIVE POSSESSING ANTI-HCV ACTIVITY
申请人:Chugai Seiyaku Kabushiki Kaisha
公开号:US20150210666A1
公开(公告)日:2015-07-30
An object of the present invention is to provide a compound that is useful as an orally available anti-HCV agent. The present invention relates to a compound represented by formula (1) or a pharmaceutically acceptable salt thereof. This compound has an anti-HCV activity and is useful as a medicine.
ORALLY ADMINISTRABLE VIRIDIOFUNGIN DERIVATIVE HAVING ANTI-HCV ACTIVITY
申请人:Chugai Seiyaku Kabushiki Kaisha
公开号:EP2886530A1
公开(公告)日:2015-06-24
An object of the present invention is to provide a compound that is useful as an orally available anti-HCV agent. The present invention relates to a compound represented by formula (1) or a pharmaceutically acceptable salt thereof. This compound has an anti-HCV activity and is useful as a medicine.