Total Syntheses of 2,2‘-epi-Cytoskyrin A, Rugulosin, and the Alleged Structure of Rugulin
摘要:
The total syntheses of 2,2'-epi-cytoskyrin A, rugulosin, and the alleged structure of rugulin are described. These naturally occurring bisanthraquinones and their relatives are characterized by novel molecular architectures at the core, at which lies a more or less complete, cage-like structural motif termed "skyrane". The strategies developed for their total synthesis feature a cascade sequence called the "cytoskyrin cascade" and deliver these molecules in short order and in a stereoselective manner.
Total Syntheses of 2,2‘-epi-Cytoskyrin A, Rugulosin, and the Alleged Structure of Rugulin
摘要:
The total syntheses of 2,2'-epi-cytoskyrin A, rugulosin, and the alleged structure of rugulin are described. These naturally occurring bisanthraquinones and their relatives are characterized by novel molecular architectures at the core, at which lies a more or less complete, cage-like structural motif termed "skyrane". The strategies developed for their total synthesis feature a cascade sequence called the "cytoskyrin cascade" and deliver these molecules in short order and in a stereoselective manner.
Rhoda‐Electrocatalyzed Bimetallic C−H Oxygenation by Weak
<i>O</i>
‐Coordination
作者:Xuefeng Tan、Leonardo Massignan、Xiaoyan Hou、Johanna Frey、João C. A. Oliveira、Masoom Nasiha Hussain、Lutz Ackermann
DOI:10.1002/anie.202017359
日期:2021.6.7
Rhodium-electrocatalyzed arene C−Hoxygenation by weakly O-coordinating amides and ketones have been established by bimetallic electrocatalysis. Likewise, diverse dihydrooxazinones were selectively accessed by the judicious choice of current, enabling twofold C−H functionalization. Detailed mechanistic studies by experiment, mass spectroscopy and cyclovoltammetric analysis provided support for an unprecedented
several neurodegenerative and psychiatric disorders; radiopharmaceuticals to image the SERT by PET would be valuable in studying these diseases. To this end we synthesized diphenyloxide derivatives and sulfide analogs, as new tracers, incorporating a fluorine or oxyalkyl fluorinated group on 4′ or 5′-position on phenyl ring B. Three of these exhibited good to high in vitro affinity (7 < Ki < 8 nM) and
由于5-羟色胺转运蛋白(SERT)参与了多种神经退行性疾病和精神疾病。用PET对SERT成像的放射性药物在研究这些疾病中将是有价值的。为此,我们合成了二苯醚衍生物和硫化物类似物,作为新的示踪剂,在苯环B的4'或5'位置掺入了氟或氧烷基氟代基团。其中三个具有良好的体外亲和力(7 < K i <8 nM)和相对于其他单胺转运蛋白的SERT选择性。
Total Syntheses of 2,2‘-<i>epi</i>-Cytoskyrin A, Rugulosin, and the Alleged Structure of Rugulin
作者:K. C. Nicolaou、Yee Hwee Lim、Jared L. Piper、Charles D. Papageorgiou
DOI:10.1021/ja0685708
日期:2007.4.1
The total syntheses of 2,2'-epi-cytoskyrin A, rugulosin, and the alleged structure of rugulin are described. These naturally occurring bisanthraquinones and their relatives are characterized by novel molecular architectures at the core, at which lies a more or less complete, cage-like structural motif termed "skyrane". The strategies developed for their total synthesis feature a cascade sequence called the "cytoskyrin cascade" and deliver these molecules in short order and in a stereoselective manner.