Iron-Catalyzed Highly Enantioselective Hydrogenation of Alkenes
作者:Peng Lu、Xiang Ren、Haofeng Xu、Dongpo Lu、Yufeng Sun、Zhan Lu
DOI:10.1021/jacs.1c04773
日期:2021.8.18
for the first time an iron-catalyzed highlyenantioselectivehydrogenation of minimally functionalized 1,1-disubstituted alkenes to accesschiral alkanes with full conversion and excellent ee. A novel chiral 8-oxazoline iminoquinoline ligand and its iron complex have been designed and synthesized. This protocol is operationally simple by using 1 atm of hydrogen gas and shows good functional group tolerance
Cobalt(II)-Catalyzed Stereoselective Olefin Isomerization: Facile Access to Acyclic Trisubstituted Alkenes
作者:Sheng Zhang、Deepika Bedi、Lu Cheng、Daniel K. Unruh、Guigen Li、Michael Findlater
DOI:10.1021/jacs.0c02101
日期:2020.5.13
Stereoselective synthesis of trisubstitutedalkenes is a long-standing challenge in organic chemistry, due to the small energy differences between E and Z isomers of trisubstitutedalkenes (compared with 1,2-disubstituted alkenes). Transition metal-catalyzed isomerization of 1,1-disubstituted alkene can serve as an alternative approach to trisubsti-tuted alkenes, but it remains underdeveloped owing
三取代烯烃的立体选择性合成是有机化学中长期存在的挑战,因为三取代烯烃的 E 和 Z 异构体之间的能量差异很小(与 1,2-二取代烯烃相比)。1,1-二取代烯烃的过渡金属催化异构化可以作为三取代烯烃的替代方法,但由于与反应效率和立体选择性有关的问题,它仍然不发达。在这里,我们展示了一种新型钴催化剂可以克服这些挑战,为获得广泛的三取代烯烃提供有效和立体选择性的途径。该协议与单烯和二烯兼容,并表现出良好的官能团耐受性和可扩展性。而且,它已被证明是构建有机发光体和氘代三取代烯烃的有用工具。对该机制的初步研究表明,该反应涉及钴氢化物途径。该反应的高立体选择性归因于 π-π 堆积效应和底物和催化剂之间的空间位阻。
[EN] 3-(PYRIDIN-3-YL)-ACRYLAMIDE AND N-(PYRIDIN-3-YL)-ACRYLAMIDE DERIVATIVES AND THEIR USE AS PAK OR NAMPT MODULATORS<br/>[FR] DÉRIVÉS 3-(PYRIDIN-3-YL)-ACRYLAMIDE ET N-(PYRIDIN-3-YL)-ACRYLAMIDE ET LEUR UTILISATION COMME MODULATEURS DE PAK OU NAMPT
申请人:KARYOPHARM THERAPEUTICS INC
公开号:WO2017031213A1
公开(公告)日:2017-02-23
The invention generally relates to cyclic compounds and, more particularly, to a compound represented by Structural Formula I: or a pharmaceutically acceptable salt thereof and pharmaceutical compositions comprising the multicyclic compounds. The invention also relates to a method for treating a disease or disorder selected from cancer (e.g., lymphoma, such as mantle cell lymphoma), a neurodegenerative disease, an inflammatory diseases or an immune system disease (e.g., a T- Cell mediated autoimmune diseases) in a subject in need thereof. The method comprises administering to a subject in need thereof a therapeutically effective amount of a compound of the invention, or a pharmaceutically acceptable salt thereof, or a composition comprising a compound of the invention, or a pharmaceutically acceptable salt thereof.
[EN] MULTICYCLIC COMPOUNDS AND USES THEREOF<br/>[FR] COMPOSÉS MULTICYCLIQUES ET LEURS UTILISATIONS
申请人:KARYOPHARM THERAPEUTICS INC
公开号:WO2017117447A1
公开(公告)日:2017-07-06
The present invention relates to multicyclic compounds containing a urea or a guanidine moiety, or pharmaceutically acceptable salts or compositions thereof represented by Structural Formula (IA) or a pharmaceutically acceptable salt thereof and pharmaceutical comopositions comprising the multicyclic compounds. The invention also relates to a method for treating a disease or disorder selected from cancer (e.g., lymphoma, such as mantle cell lymphoma), a neurodegenerative disease, an inflammatory diseases or an immune system disease (e.g., a T-Cell mediated autoimmune disesase) in a subject in need thereof. The method comprises administering to a subject in need thereof a therapeutically effective amount of a compound of the invention, or a pharmaceutically acceptable salt thereof, or a composition comprising a compound of the invention, or a pharmaceutically acceptable salt thereof.
Herein, we report an unprecedented regiospecific oxidative Mizoroki-Heck type reaction for the synthesis of α-difluoromethyl homoallylic alcohols. The reaction shows broad substrate scopes and high functional group tolerance. Late-stage functionalization of complex biologically active molecules demonstrates the synthetic potential of this transformation. Mechanistic study supports the involvement of