367965-70-6Relevant articles and documents
Polynuclear Enantiopure Salen-Mesoionic Carbene Hybrid Complexes
Schmid, Juliane,Frey, Wolfgang,Peters, René
, p. 4313 - 4324 (2017/11/20)
Salen ligands and mesoionic carbene (MIC) ligands constitute important ligand classes in homogeneous catalysis. In this article we describe the first integration of a salen moiety and MIC donors in the same catalyst entity. Homo- and heterometallic polynuclear metal complexes could be selectively prepared by first installing a metal center (Ni(II), Pd(II)) in the N2O2 salen sphere followed by metalation of the mesoionic carbenes (Ag(I), Pd(II)). The silver complexes could be used for transmetalations to form Au(III) complexes. Several complexes showed catalytic activity in the 1,4-addition of an oxindole to a nitroolefin.
Titanium Salen Complexes with Appended Silver NHC Groups as Nucleophilic Carbene Reservoir for Cooperative Asymmetric Lewis Acid/NHC Catalysis
Latendorf, Katja,Mechler, Melanie,Schamne, Irina,Mack, Daniel,Frey, Wolfgang,Peters, René
, p. 4140 - 4167 (2017/08/07)
Lewis acid catalysis and nucleophilic carbene catalysis are complementary fundamental concepts to accelerate and control chemical reactions of aldehyde substrates. Their efficient merger has recently been achieved using two separate catalyst species. The
METHOD OF PREPARING POLY(ALKYLENE CARBONATE) VIA COPOLYMERIZATION OF CARBON DIOXIDE/EPOXIDE IN THE PRESENCE OF NOVEL COMPLEX
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, (2014/10/04)
Provided is a method of preparing poly(alkylene carbonate) using a molecular weight regulator in a process of preparing a copolymer of carbon dioxide/epoxide using a novel complex synthesized from salen-type ligand including a quaternary ammonium salt as a catalyst. According to the present invention, even though the molecular weight regulator is used, an activity of the catalyst may be stably maintained, whereby the low molecular weight of poly(alkylene carbonate) having a desirable level may be effectively provided. In addition, it is expected that since the novel complex as the catalyst of the present invention has a simple structure as compared to the existing copolymerization catalyst, due to the economical preparation cost thereof, the novel complex may be effectively applied to a large-scale commercial process.