Enantioselective Desymmetrization of Bisphenol Derivatives via Ir-Catalyzed Allylic Dearomatization
作者:Ye Wang、Wen-Yun Zhang、Jia-Hao Xie、Zong-Lun Yu、Jia-Hao Tan、Chao Zheng、Xue-Long Hou、Shu-Li You
DOI:10.1021/jacs.0c09638
日期:2020.11.11
99% ee). The high efficiency of this reaction is exemplified by the short reaction time (30 min), low catalyst loading (down to 0.2 mol %), and ability to perform the reaction on a gram-scale. The total syntheses of (+)-tatanan B and (+)-tatanan C were also realized using this Ir-catalyzed allylic dearomatization reaction as a keystep.
天然产物中经常发现具有多个立体中心的螺环己二烯酮,但合成目标仍然具有挑战性。在此,我们报告了通过 Ir 催化的烯丙基脱芳构化反应对双酚衍生物进行对映选择性去对称化,以良好的产率(高达 90%)和出色的对映选择性(高达 99% ee)提供具有多达三个连续立体中心的螺环己二烯酮衍生物。该反应的高效率体现在反应时间短(30 分钟)、催化剂负载量低(低至 0.2 mol%)以及以克规模进行反应的能力。(+)-tatanan B 和 (+)-tatanan C 的全合成也是使用这种 Ir 催化的烯丙基脱芳构化反应作为关键步骤来实现的。
Adenosine Derivatives as A2A Receptor Agonists
申请人:Novartis AG
公开号:EP1903044A1
公开(公告)日:2008-03-26
A compound of formula (I), or stereoisomers or pharmaceutically acceptable salts thereof,
or stereoisomers or pharmaceutically acceptable salts thereof,
wherein A, U1, U2, R1a, R1b, R2 and R3 have the meanings as indicated in the specification, are useful for treating conditions mediated by activation of the adenosine A2A receptor, especially inflammatory or obstructive airways diseases. Pharmaceutical compositions that contain the compounds and a process for preparing the compounds are also described.
A compound of formula (I) or stereoisomers or pharmaceutically acceptable salts thereof, and their preparation and use as pharmaceuticals
wherein R
1
, R
2
and R
3
are as defined herein.
[EN] INHIBITORS OF MACROPHAGE MIGRATION INHIBITORY FACTOR<br/>[FR] INHIBITEURS DU FACTEUR D'INHIBITION DE LA MIGRATION DES MACROPHAGES
申请人:HAMPTON MARK
公开号:WO2010140902A1
公开(公告)日:2010-12-09
The invention provides the use of isothiocyanate and isoselenocyanate compounds for treating diseases and conditions mediated by MIF.
本发明提供了使用异硫氰酸盐和异硒氰酸盐化合物来治疗由MIF介导的疾病和病症的方法。
ADENOSINE DERIVATIVES AS A2A RECEPTOR AGONISTS
申请人:Fairhurst Robin Alec
公开号:US20090325967A1
公开(公告)日:2009-12-31
A compound of formula (I), or stereoisomers or pharmaceutically acceptable salts thereof, formula (1), or stereoisomers or pharmaceutically acceptable salts thereof, wherein A, U
1
, U
2
, R
1a
, R
1b
, R
2
and R
3
have the meanings as indicated in the specification, are useful for treating conditions mediated by activation of the adenosine A
2A
receptor, especially inflammatory or obstructive airways diseases. Pharmaceutical compositions that contain the compounds and a process for preparing the compounds are also described.