Controlled Exchange of Achiral Linkers with Chiral Linkers in Zr-Based UiO-68 Metal–Organic Framework
作者:Chunxia Tan、Xing Han、Zijian Li、Yan Liu、Yong Cui
DOI:10.1021/jacs.8b09606
日期:2018.11.28
linker MOFs are active and efficient catalysts for asymmetric cyanosilylation of aldehydes, ring-opening of epoxides, oxidative kinetic resolution of secondary alcohols, and aminolysis of stilbene oxide, and the mixed-M(salen) linker variants are active for sequential asymmetric alkeneepoxidation/epoxide ring-opening reactions. The chiral MOF catalysts are highly enantioselective and completely heterogeneous
Reusable chiral macrocyclic Mn(III) salen complexes for enantioselective epoxidation of nonfunctionalized alkenes
作者:Rukhsana I. Kureshy、Tamal Roy、Noor-ul H. Khan、Sayed H.R. Abdi、Arghya Sadhukhan、Hari C. Bajaj
DOI:10.1016/j.jcat.2011.10.011
日期:2012.2
A series of new chiral monomeric and dimeric macrocyclic Mn(III) salen complexes 1–4 with trigol linker were synthesized, characterized (by microanalysis, IR spectroscopy, UV–vis. spectroscopy, optical rotation, and mass spectrometry), and used as catalysts in the enantioselectiveepoxidation of styrene, cis β-methyl styrene, indene, and chromenes in the presence of several N-oxides as an axial base
Synthesis of Metal–(Pentadentate-Salen) Complexes: Asymmetric Epoxidation with Aqueous Hydrogen Peroxide and Asymmetric Cyclopropanation (salenH2:N,N′-bis(salicylidene)ethylene-1,2-diamine)
作者:Hiroaki Shitama、Tsutomu Katsuki
DOI:10.1002/chem.200601420
日期:2007.6.4
manganese(III) and cobalt(II) complexes, in which the fifth ligand is expected to intramolecularly coordinate to the metal center and exert a trans effect. Indeed, high enantioselectivity has been achieved in epoxidations using aqueous hydrogen peroxide as the terminal oxidant and in cyclopropanations with these complexes as catalysts. In general, metallosalen-catalyzed reactions have been carried out
[EN] GEM-DISUBSTITUTED AND SPIROCYCLIC AMINO PYRIDINES/PYRIMIDINES AS CELL CYCLE INHIBITORS<br/>[FR] PYRIDINES/PYRIMIDINES AMINO SPIROCYCLIQUES ET DISUBSTITUÉES PAR GEM EN TANT QU'INHIBITEURS DE CYCLE CELLULAIRE
申请人:AMGEN INC
公开号:WO2009126584A1
公开(公告)日:2009-10-15
Compounds, pharmaceutical compositions and methods are provided that are useful in the treatment of CDK4-mediated disorders, such as cancer. The subject compounds are gem-disubstituted or spirocyclic pyridine, pyrimidine and triazine derivatives.
Asymmetric Counteranion-Directed Transition-Metal Catalysis: Enantioselective Epoxidation of Alkenes with Manganese(III) Salen Phosphate Complexes
作者:Saihu Liao、Benjamin List
DOI:10.1002/anie.200905332
日期:2010.1.12
Paired up: A highly active and enantioselective ion‐pair epoxidationcatalyst, consisting of an achiral MnIII–salen complex and a chiral phosphate counteranion, mediates the epoxidization of a wide range of alkenes with high yields and enantioselectivities (see scheme). The unique role of the counteranion is to stabilize an enantiomorphic conformation of the cationic Mn catalyst.
配对:高活性和对映选择性离子对环氧化催化剂,由非手性Mn III -salen配合物和手性磷酸抗衡阴离子组成,可介导高产率和对映选择性的多种烯烃的环氧化。抗衡阴离子的独特作用是稳定阳离子Mn催化剂的对映体构象。