80314-58-5Relevant articles and documents
Copolymerization of carbon dioxide and propylene oxide by several metallosalen-based bifunctional catalysts
Zhu, Wenkai,Du, Longchao,Qian, Siyu,Yang, Qingsong,Song, Wanjie
, p. 841 - 849 (2018)
A series of new metallosalen-based bifunctional catalysts with Co(III), Cr(III), Fe(III), Mn(III), and Ni(III) were synthesized for the first time, and a detailed study on the mechanism of the copolymerization of CO2 and propylene oxide (PO) was performed. Meanwhile, the impact factors of the reaction conditions (metal cations, temperature, CO2 pressure, and reaction time) on catalytic activity and selectivity were investigated. The results indicated that, with the increase of temperature, both the catalyst efficiency and the molecular weight of the copolymer decrease for all the five complexes. The salen-Co(III) complex demonstrated higher activity under mild conditions: reaction temperature at 30 °C, copolymerization time of 24 hr, and 2 MPa of CO2 pressure. The DSC curve indicated that the PPC by the salen-Co(III) complex has the highest Tg of 46.19 °C. DTGA curves demonstrated that there were two thermal degradation peaks: the first is for the ester bond, and the second is for the C?C bond.
Oxidative 1,2-Difunctionalization of Ethylene via Gold-Catalyzed Oxyarylation
Harper, Matthew J.,Emmett, Edward J.,Bower, John F.,Russell, Christopher A.
, p. 12386 - 12389 (2017/09/22)
Under the conditions of oxidative gold catalysis, exposure of ethylene to aryl silanes and alcohols generates products of 1,2-oxyarylation. This provides a rare example of a process that allows catalytic differential 1,2-difunctionalization of this feedstock chemical.
Cross-coupling of alkyl halides with aryl or alkyl Grignards catalyzed by dinuclear Ni(ii) complexes containing functionalized tripodal amine-pyrazolyl ligands
Xue, Fei,Zhao, Jin,Hor, T. S. Andy
, p. 5150 - 5158 (2013/04/10)
Structurally distinctive dinuclear Ni(ii) complexes with furan or thiophene tethered amine-pyrazolyl tripodal hybrid ligands have been synthesized and crystallographically characterized. All complexes are catalytically active towards cross-coupling of aryl/alkyl Grignard reagents with β-H containing alkyl halides at room temperature in the presence of N,N,N',N'- tetramethylethylenediamine (TMEDA). The catalytic efficacy of the complexes is dependent on the tether substituent at the central amine. Two species, Ni(ii) TMEDA and Mg(ii) TMEDA complexes, have been isolated from the catalytic reaction mixtures under different conditions. Some ligand-stabilized Ni(ii) and Mg(ii) bimetallic species have also been identified in the ESI-MS spectra.